TY - INPR
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A1 - Actis, M.
A1 - Aghajani, T.
A1 - Agnetta, G.
A1 - Aguilar, J.
A1 - Aharonian, Felix A.
A1 - Ajello, M.
A1 - Akhperjanian, A. G.
A1 - Alcubierre, M.
A1 - Aleksic, J.
A1 - Alfaro, R.
A1 - Aliu, E.
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A1 - Allan, D.
A1 - Allekotte, I.
A1 - Amato, E.
A1 - Anderson, J.
A1 - Angüner, Ekrem Oǧuzhan
A1 - Antonelli, L. A.
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A1 - Ashton, T.
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A1 - Awane, Y.
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A1 - Barnacka, Anna
A1 - Barnstedt, Jürgen
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A1 - Basso, S.
A1 - Bastieri, D.
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A1 - Baushev, Anton N.
A1 - Becerra Gonzalez, J.
A1 - Becherini, Yvonne
A1 - Bechtol, K. C.
A1 - Tjus, J. Becker
A1 - Beckmann, Volker
A1 - Bednarek, W.
A1 - Behera, B.
A1 - Belluso, M.
A1 - Benbow, W.
A1 - Berdugo, J.
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A1 - Bernardino, T.
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A1 - Birsin, E.
A1 - Bissaldi, E.
A1 - Biteau, Jonathan
A1 - Bitossi, M.
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A1 - Blanch Bigas, O.
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A1 - Bobkov, A. A.
A1 - Boccone, V.
A1 - Boettcher, Markus
A1 - Bogacz, L.
A1 - Bogart, J.
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A1 - Boisson, Catherine
A1 - Boix Gargallo, J.
A1 - Bolmont, J.
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A1 - Bonifacio, P.
A1 - Bonnoli, G.
A1 - Bordas, Pol
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A1 - Borkowski, Janett
A1 - Bose, R.
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A1 - Bottani, A.
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A1 - Braun, I.
A1 - Bretz, T.
A1 - Briggs, M. S.
A1 - Bringmann, T.
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A1 - Brun, Pierre
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A1 - Bugaev, V.
A1 - Bulgarelli, A.
A1 - Bulik, Tomasz
A1 - Busetto, G.
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A1 - Cailles, M.
A1 - Cameron, R. A.
A1 - Camprecios, J.
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A1 - Carmona, E.
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A1 - Carr, John
A1 - Carton, P. H.
A1 - Casanova, Sabrina
A1 - Casiraghi, M.
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A1 - Conforti, V.
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A1 - Cossio, L.
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A1 - De La Vega, G. A.
A1 - Lopez, R. de los Reyes
A1 - De Lotto, B.
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A1 - de Naurois, M.
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A1 - Delgado, C.
A1 - Della Volpe, D.
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A1 - Diaz, C.
A1 - Dick, J.
A1 - Dickherber, R.
A1 - Dickinson, H.
A1 - Diez-Blanco, V.
A1 - Digel, S.
A1 - Dimitrov, D.
A1 - Disset, G.
A1 - Djannati-Ataï, A.
A1 - Doert, M.
A1 - Dohmke, M.
A1 - Domainko, W.
A1 - Prester, Dijana Dominis
A1 - Donat, A.
A1 - Dorner, D.
A1 - Doro, M.
A1 - Dournaux, J-L.
A1 - Drake, G.
A1 - Dravins, D.
A1 - Drury, L.
A1 - Dubois, F.
A1 - Dubois, R.
A1 - Dubus, G.
A1 - Dufour, C.
A1 - Dumas, D.
A1 - Dumm, J.
A1 - Durand, D.
A1 - Dyks, J.
A1 - Dyrda, M.
A1 - Ebr, J.
A1 - Edy, E.
A1 - Egberts, Kathrin
A1 - Eger, P.
A1 - Einecke, S.
A1 - Eleftheriadis, C.
A1 - Elles, S.
A1 - Emmanoulopoulos, D.
A1 - Engelhaupt, D.
A1 - Enomoto, R.
A1 - Ernenwein, J-P
A1 - Errando, M.
A1 - Etchegoyen, A.
A1 - Evans, P.
A1 - Falcone, A.
A1 - Fantinel, D.
A1 - Farakos, K.
A1 - Farnier, C.
A1 - Fasola, G.
A1 - Favill, B.
A1 - Fede, E.
A1 - Federici, S.
A1 - Fegan, S.
A1 - Feinstein, F.
A1 - Ferenc, D.
A1 - Ferrando, P.
A1 - Fesquet, M.
A1 - Fiasson, A.
A1 - Fillin-Martino, E.
A1 - Fink, D.
A1 - Finley, C.
A1 - Finley, J. P.
A1 - Fiorini, M.
A1 - Firpo Curcoll, R.
A1 - Flores, H.
A1 - Florin, D.
A1 - Focke, W.
A1 - Foehr, C.
A1 - Fokitis, E.
A1 - Font, L.
A1 - Fontaine, G.
A1 - Fornasa, M.
A1 - Foerster, A.
A1 - Fortson, L.
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A1 - Franckowiak, A.
A1 - Fransson, C.
A1 - Fraser, G.
A1 - Frei, R.
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A1 - Fresnillo, L.
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A1 - Fujita, Y.
A1 - Fukazawa, Y.
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A1 - Funk, S.
A1 - Gaebele, W.
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A1 - Gabriele, R.
A1 - Gadola, A.
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A1 - Gamez-Garcia, J.
A1 - Garcia, B.
A1 - Garcia Lopez, R.
A1 - Gardiol, D.
A1 - Garrido, D.
A1 - Garrido, L.
A1 - Gascon, D.
A1 - Gaug, M.
A1 - Gaweda, J.
A1 - Gebremedhin, L.
A1 - Geffroy, N.
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A1 - Ghigo, M.
A1 - Giannakaki, E.
A1 - Gianotti, F.
A1 - Giarrusso, S.
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A1 - Giebels, B.
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A1 - Glanzman, T.
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A1 - Gonzalez, F.
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A1 - Sanchez, F.
A1 - Sanchez-Conde, M.
A1 - Sandoval, A.
A1 - Sandaker, H.
A1 - Sant'Ambrogio, E.
A1 - Santangelo, Andrea
A1 - Santos, E. M.
A1 - Sanuy, A.
A1 - Sapozhnikov, L.
A1 - Sarkar, S.
A1 - Sartore, N.
A1 - Sasaki, H.
A1 - Satalecka, K.
A1 - Sawada, M.
A1 - Scalzotto, V.
A1 - Scapin, V.
A1 - Scarcioffolo, M.
A1 - Schafer, J.
A1 - Schanz, T.
A1 - Schlenstedt, S.
A1 - Schlickeiser, R.
A1 - Schmidt, T.
A1 - Schmoll, J.
A1 - Schovanek, P.
A1 - Schroedter, M.
A1 - Schultz, C.
A1 - Schultze, J.
A1 - Schulz, A.
A1 - Schure, K.
A1 - Schwab, T.
A1 - Schwanke, U.
A1 - Schwarz, J.
A1 - Schwarzburg, S.
A1 - Schweizer, T.
A1 - Schwemmer, S.
A1 - Segreto, A.
A1 - Seiradakis, J. -H.
A1 - Sembroski, G. H.
A1 - Seweryn, K.
A1 - Sharma, M.
A1 - Shayduk, M.
A1 - Shellard, R. C.
A1 - Shi, J.
A1 - Shibata, T.
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A1 - Shum, E.
A1 - Sidoli, L.
A1 - Sidz, M.
A1 - Sieiro, J.
A1 - Sikora, M.
A1 - Silk, J.
A1 - Sillanpaa, A.
A1 - Singh, B. B.
A1 - Sitarek, J.
A1 - Skole, C.
A1 - Smareglia, R.
A1 - Smith, A.
A1 - Smith, D.
A1 - Smith, J.
A1 - Smith, N.
A1 - Sobczynska, D.
A1 - Sol, H.
A1 - Sottile, G.
A1 - Sowinski, M.
A1 - Spanier, F.
A1 - Spiga, D.
A1 - Spyrou, S.
A1 - Stamatescu, V.
A1 - Stamerra, A.
A1 - Starling, R.
A1 - Stawarz, L.
A1 - Steenkamp, R.
A1 - Stegmann, Christian
A1 - Steiner, S.
A1 - Stergioulas, N.
A1 - Sternberger, R.
A1 - Sterzel, M.
A1 - Stinzing, F.
A1 - Stodulski, M.
A1 - Straumann, U.
A1 - Strazzeri, E.
A1 - Stringhetti, L.
A1 - Suarez, A.
A1 - Suchenek, M.
A1 - Sugawara, R.
A1 - Sulanke, K. -H.
A1 - Sun, S.
A1 - Supanitsky, A. D.
A1 - Suric, T.
A1 - Sutcliffe, P.
A1 - Sykes, J.
A1 - Szanecki, M.
A1 - Szepieniec, T.
A1 - Szostek, A.
A1 - Tagliaferri, G.
A1 - Tajima, H.
A1 - Takahashi, H.
A1 - Takahashi, K.
A1 - Takalo, L.
A1 - Takami, H.
A1 - Talbot, C.
A1 - Tammi, J.
A1 - Tanaka, M.
A1 - Tanaka, S.
A1 - Tasan, J.
A1 - Tavani, M.
A1 - Tavernet, J. -P.
A1 - Tejedor, L. A.
A1 - Telezhinsky, Igor O.
A1 - Temnikov, P.
A1 - Tenzer, C.
A1 - Terada, Y.
A1 - Terrier, R.
A1 - Teshima, M.
A1 - Testa, V.
A1 - Tezier, D.
A1 - Thuermann, D.
A1 - Tibaldo, L.
A1 - Tibolla, O.
A1 - Tiengo, A.
A1 - Tluczykont, M.
A1 - Todero Peixoto, C. J.
A1 - Tokanai, F.
A1 - Tokarz, M.
A1 - Toma, K.
A1 - Torii, K.
A1 - Tornikoski, M.
A1 - Torres, D. F.
A1 - Torres, M.
A1 - Tosti, G.
A1 - Totani, T.
A1 - Toussenel, C.
A1 - Tovmassian, G.
A1 - Travnicek, P.
A1 - Trifoglio, M.
A1 - Troyano, I.
A1 - Tsinganos, K.
A1 - Ueno, H.
A1 - Umehara, K.
A1 - Upadhya, S. S.
A1 - Usher, T.
A1 - Uslenghi, M.
A1 - Valdes-Galicia, J. F.
A1 - Vallania, P.
A1 - Vallejo, G.
A1 - van Driel, W.
A1 - van Eldik, C.
A1 - Vandenbrouke, J.
A1 - Vanderwalt, J.
A1 - Vankov, H.
A1 - Vasileiadis, G.
A1 - Vassiliev, V.
A1 - Veberic, D.
A1 - Vegas, I.
A1 - Vercellone, S.
A1 - Vergani, S.
A1 - Veyssiere, C.
A1 - Vialle, J. P.
A1 - Viana, A.
A1 - Videla, M.
A1 - Vincent, P.
A1 - Vincent, S.
A1 - Vink, J.
A1 - Vlahakis, N.
A1 - Vlahos, L.
A1 - Vogler, P.
A1 - Vollhardt, A.
A1 - von Gunten, H. P.
A1 - Vorobiov, S.
A1 - Vuerli, C.
A1 - Waegebaert, V.
A1 - Wagner, R.
A1 - Wagner, R. G.
A1 - Wagner, S.
A1 - Wakely, S. P.
A1 - Walter, R.
A1 - Walther, T.
A1 - Warda, K.
A1 - Warwick, R.
A1 - Wawer, P.
A1 - Wawrzaszek, R.
A1 - Webb, N.
A1 - Wegner, P.
A1 - Weinstein, A.
A1 - Weitzel, Q.
A1 - Welsing, R.
A1 - Werner, M.
A1 - Wetteskind, H.
A1 - White, R.
A1 - Wierzcholska, A.
A1 - Wiesand, S.
A1 - Wilkinson, M.
A1 - Williams, D. A.
A1 - Willingale, R.
A1 - Winiarski, K.
A1 - Wischnewski, R.
A1 - Wisniewski, L.
A1 - Wood, M.
A1 - Woernlein, A.
A1 - Xiong, Q.
A1 - Yadav, K. K.
A1 - Yamamoto, H.
A1 - Yamamoto, T.
A1 - Yamazaki, R.
A1 - Yanagita, S.
A1 - Yebras, J. M.
A1 - Yelos, D.
A1 - Yoshida, A.
A1 - Yoshida, T.
A1 - Yoshikoshi, T.
A1 - Zabalza, V.
A1 - Zacharias, M.
A1 - Zajczyk, A.
A1 - Zanin, R.
A1 - Zdziarski, A.
A1 - Zech, Alraune
A1 - Zhao, A.
A1 - Zhou, X.
A1 - Zietara, K.
A1 - Ziolkowski, J.
A1 - Ziolkowski, P.
A1 - Zitelli, V.
A1 - Zurbach, C.
A1 - Zychowski, P.
T1 - Introducing the CTA concept
T2 - Astroparticle physics
N2 - The Cherenkov Telescope Array (CTA) is a new observatory for very high-energy (VHE) gamma rays. CTA has ambitions science goals, for which it is necessary to achieve full-sky coverage, to improve the sensitivity by about an order of magnitude, to span about four decades of energy, from a few tens of GeV to above 100 TeV with enhanced angular and energy resolutions over existing VHE gamma-ray observatories. An international collaboration has formed with more than 1000 members from 27 countries in Europe, Asia, Africa and North and South America. In 2010 the CTA Consortium completed a Design Study and started a three-year Preparatory Phase which leads to production readiness of CTA in 2014. In this paper we introduce the science goals and the concept of CTA, and provide an overview of the project.
KW - TeV gamma-ray astronomy
KW - Air showers
KW - Cherenkov Telescopes
Y1 - 2013
U6 - https://doi.org/10.1016/j.astropartphys.2013.01.007
SN - 0927-6505
SN - 1873-2852
VL - 43
IS - 2
SP - 3
EP - 18
PB - Elsevier
CY - Amsterdam
ER -
TY - JOUR
A1 - Abdalla, H.
A1 - Adam, R.
A1 - Aharonian, Felix A.
A1 - Benkhali, F. Ait
A1 - Angüner, Ekrem Oǧuzhan
A1 - Arcaro, C.
A1 - Armand, C.
A1 - Armstrong, T.
A1 - Ashkar, H.
A1 - Backes, M.
A1 - Baghmanyan, V.
A1 - Martins, V. Barbosa
A1 - Barnacka, A.
A1 - Barnard, M.
A1 - Becherini, Y.
A1 - Berge, D.
A1 - Bernlohr, K.
A1 - Bi, B.
A1 - Bottcher, M.
A1 - Boisson, C.
A1 - Bolmont, J.
A1 - de Lavergne, M. de Bony
A1 - Bordas, Pol
A1 - Breuhaus, M.
A1 - Brun, F.
A1 - Brun, P.
A1 - Bryan, M.
A1 - Buchele, M.
A1 - Bulik, T.
A1 - Bylund, T.
A1 - Caroff, S.
A1 - Carosi, A.
A1 - Casanova, Sabrina
A1 - Chand, T.
A1 - Chandra, S.
A1 - Chen, A.
A1 - Cotter, G.
A1 - Curylo, M.
A1 - Mbarubucyeye, J. Damascene
A1 - Davids, I. D.
A1 - Davies, J.
A1 - Deil, C.
A1 - Devin, J.
A1 - deWilt, P.
A1 - Dirson, L.
A1 - Djannati-Atai, A.
A1 - Dmytriiev, A.
A1 - Donath, A.
A1 - Doroshenko, V.
A1 - Duffy, C.
A1 - Dyks, J.
A1 - Egberts, Kathrin
A1 - Eichhorn, F.
A1 - Einecke, S.
A1 - Emery, G.
A1 - Ernenwein, J. -P.
A1 - Feijen, K.
A1 - Fegan, S.
A1 - Fiasson, A.
A1 - de Clairfontaine, G. Fichet
A1 - Fontaine, G.
A1 - Funk, S.
A1 - Fussling, Matthias
A1 - Gabici, S.
A1 - Gallant, Y. A.
A1 - Giavitto, G.
A1 - Giunti, L.
A1 - Glawion, D.
A1 - Glicenstein, J. F.
A1 - Gottschall, D.
A1 - Grondin, M. -H.
A1 - Hahn, J.
A1 - Haupt, M.
A1 - Hermann, G.
A1 - Hinton, J. A.
A1 - Hofmann, W.
A1 - Hoischen, Clemens
A1 - Holch, T. L.
A1 - Holler, M.
A1 - Horbe, M.
A1 - Horns, D.
A1 - Huber, D.
A1 - Jamrozy, M.
A1 - Jankowsky, D.
A1 - Jankowsky, F.
A1 - Jardin-Blicq, A.
A1 - Joshi, V.
A1 - Jung-Richardt, I.
A1 - Kasai, E.
A1 - Kastendieck, M. A.
A1 - Katarzynski, K.
A1 - Katz, U.
A1 - Khangulyan, D.
A1 - Khelifi, B.
A1 - Klepser, S.
A1 - Kluzniak, W.
A1 - Komin, Nu.
A1 - Konno, R.
A1 - Kosack, K.
A1 - Kostunin, D.
A1 - Kreter, M.
A1 - Lamanna, G.
A1 - Lemiere, A.
A1 - Lemoine-Goumard, M.
A1 - Lenain, J. -P.
A1 - Levy, C.
A1 - Lohse, T.
A1 - Lypova, I.
A1 - Mackey, J.
A1 - Majumdar, J.
A1 - Malyshev, D.
A1 - Malyshev, D.
A1 - Marandon, V.
A1 - Marchegiani, P.
A1 - Marcowith, Alexandre
A1 - Mares, A.
A1 - Marti-Devesa, G.
A1 - Marx, R.
A1 - Maurin, G.
A1 - Meintjes, P. J.
A1 - Meyer, M.
A1 - Mitchell, A.
A1 - Moderski, R.
A1 - Mohamed, M.
A1 - Mohrmann, L.
A1 - Montanari, A.
A1 - Moore, C.
A1 - Morris, P.
A1 - Moulin, Emmanuel
A1 - Muller, J.
A1 - Murach, T.
A1 - Nakashima, K.
A1 - Nayerhoda, A.
A1 - de Naurois, M.
A1 - Ndiyavala, H.
A1 - Niederwanger, F.
A1 - Niemiec, J.
A1 - Oakes, L.
A1 - O'Brien, Patrick
A1 - Odaka, H.
A1 - Ohm, S.
A1 - Olivera-Nieto, L.
A1 - Wilhelmi, E. de Ona
A1 - Ostrowski, M.
A1 - Oya, I.
A1 - Panter, M.
A1 - Panny, S.
A1 - Parsons, R. D.
A1 - Peron, G.
A1 - Peyaud, B.
A1 - Piel, Q.
A1 - Pita, S.
A1 - Poireau, V.
A1 - Noel, A. Priyana
A1 - Prokhorov, D. A.
A1 - Prokoph, H.
A1 - Puhlhofer, G.
A1 - Punch, M.
A1 - Quirrenbach, A.
A1 - Raab, S.
A1 - Rauth, R.
A1 - Reichherzer, P.
A1 - Reimer, A.
A1 - Reimer, O.
A1 - Remy, Q.
A1 - Renaud, M.
A1 - Rieger, F.
A1 - Rinchiuso, L.
A1 - Romoli, C.
A1 - Rowell, G.
A1 - Rudak, B.
A1 - Ruiz-Velasco, E.
A1 - Sahakian, V.
A1 - Sailer, S.
A1 - Sanchez, D. A.
A1 - Santangelo, Andrea
A1 - Sasaki, M.
A1 - Scalici, M.
A1 - Schussler, F.
A1 - Schutte, H. M.
A1 - Schwanke, U.
A1 - Schwemmer, S.
A1 - Seglar-Arroyo, M.
A1 - Senniappan, M.
A1 - Seyffert, A. S.
A1 - Shafi, N.
A1 - Shiningayamwe, K.
A1 - Simoni, R.
A1 - Sinha, A.
A1 - Sol, H.
A1 - Specovius, A.
A1 - Spencer, S.
A1 - Spir-Jacob, M.
A1 - Stawarz, L.
A1 - Sun, L.
A1 - Steenkamp, R.
A1 - Stegmann, C.
A1 - Steinmassl, S.
A1 - Steppa, C.
A1 - Takahashi, T.
A1 - Tavernier, T.
A1 - Taylor, A. M.
A1 - Terrier, R.
A1 - Tiziani, D.
A1 - Tluczykont, M.
A1 - Tomankova, L.
A1 - Trichard, C.
A1 - Tsirou, M.
A1 - Tuffs, R.
A1 - Uchiyama, Y.
A1 - van der Walt, D. J.
A1 - van Eldik, C.
A1 - van Rensburg, C.
A1 - van Soelen, B.
A1 - Vasileiadis, G.
A1 - Veh, J.
A1 - Venter, C.
A1 - Vincent, P.
A1 - Vink, J.
A1 - Volk, H. J.
A1 - Vuillaume, T.
A1 - Wadiasingh, Z.
A1 - Wagner, S. J.
A1 - Watson, J.
A1 - Werner, F.
A1 - White, R.
A1 - Wierzcholska, A.
A1 - Wong, Yu Wun
A1 - Yusafzai, A.
A1 - Zacharias, M.
A1 - Zanin, R.
A1 - Zargaryan, D.
A1 - Zdziarski, A. A.
A1 - Zech, Alraune
A1 - Zhu, S. J.
A1 - Ziegler, A.
A1 - Zorn, J.
A1 - Zouari, S.
A1 - Zywucka, N.
T1 - An extreme particle accelerator in the Galactic plane
BT - HESS J1826-130
JF - Astronomy and astrophysics : an international weekly journal
N2 - The unidentified very-high-energy (VHE; E > 0.1 TeV) gamma -ray source, HESS J1826-130, was discovered with the High Energy Stereoscopic System (HESS) in the Galactic plane. The analysis of 215 h of HESS data has revealed a steady gamma -ray flux from HESS J1826-130, which appears extended with a half-width of 0.21 degrees +/- 0.02
(stat)degrees
stat degrees +/- 0.05
(sys)degrees sys degrees . The source spectrum is best fit with either a power-law function with a spectral index Gamma = 1.78 +/- 0.10(stat) +/- 0.20(sys) and an exponential cut-off at 15.2
(+5.5)(-3.2) -3.2+5.5 TeV, or a broken power-law with Gamma (1) = 1.96 +/- 0.06(stat) +/- 0.20(sys), Gamma (2) = 3.59 +/- 0.69(stat) +/- 0.20(sys) for energies below and above E-br = 11.2 +/- 2.7 TeV, respectively. The VHE flux from HESS J1826-130 is contaminated by the extended emission of the bright, nearby pulsar wind nebula, HESS J1825-137, particularly at the low end of the energy spectrum. Leptonic scenarios for the origin of HESS J1826-130 VHE emission related to PSR J1826-1256 are confronted by our spectral and morphological analysis. In a hadronic framework, taking into account the properties of dense gas regions surrounding HESS J1826-130, the source spectrum would imply an astrophysical object capable of accelerating the parent particle population up to greater than or similar to 200 TeV. Our results are also discussed in a multiwavelength context, accounting for both the presence of nearby supernova remnants, molecular clouds, and counterparts detected in radio, X-rays, and TeV energies.
KW - ISM: supernova remnants
KW - ISM: clouds
KW - gamma rays: general
KW - gamma rays:
KW - ISM
Y1 - 2020
U6 - https://doi.org/10.1051/0004-6361/202038851
SN - 0004-6361
SN - 1432-0746
VL - 644
PB - EDP Sciences
CY - Les Ulis
ER -
TY - JOUR
A1 - Abdalla, Hassan E.
A1 - Aharonian, Felix A.
A1 - Ait Benkhali, Faical
A1 - Angüner, Ekrem Oǧuzhan
A1 - Arakawa, M.
A1 - Arcaro, C.
A1 - Armand, C.
A1 - Arrieta, M.
A1 - Backes, Michael
A1 - Barnard, M.
A1 - Becherini, Yvonne
A1 - Tjus, J. Becker
A1 - Berge, D.
A1 - Bernhard, S.
A1 - Bernlöhr, Konrad
A1 - Blackwell, R.
A1 - Böttcher, Markus
A1 - Boisson, C.
A1 - Bolmont, Julien
A1 - Bonnefoy, S.
A1 - Bordas, Pol
A1 - Bregeon, J.
A1 - Brun, F.
A1 - Brun, P.
A1 - Bryan, M.
A1 - Büchele, M.
A1 - Bulik, Tomasz
A1 - Bylund, Tomas
A1 - Capasso, Massimo
A1 - Caroff, S.
A1 - Carosi, A.
A1 - Casanova, Sabrina
A1 - Cerruti, Matteo
A1 - Chakraborty, Nachiketa
A1 - Chandra, S.
A1 - Chaves, R. C. G.
A1 - Chen, A.
A1 - Colafrancesco, Sergio
A1 - Condon, B.
A1 - Davids, Isak
A1 - Deil, Christoph
A1 - Devin, J.
A1 - deWilt, P.
A1 - Dirson, L.
A1 - Djannati-Atai, A.
A1 - Dmytriiev, A.
A1 - Donath, Axel
A1 - Doroshenko, Victor
A1 - Dyks, J.
A1 - Egberts, Kathrin
A1 - Emery, G.
A1 - Ernenwein, J. -P.
A1 - Eschbach, Stefan
A1 - Fegan, S.
A1 - Fiasson, Armand
A1 - Fontaine, G.
A1 - Funk, Sebastian
A1 - Füßling, Matthias
A1 - Gabici, S.
A1 - Gallant, Y. A.
A1 - Gate, F.
A1 - Giavitto, Gianluca
A1 - Eisenacher Glawion, Dorit
A1 - Glicenstein, Jean-François
A1 - Gottschall, D.
A1 - Grondin, Marie-Hélène
A1 - Hahn, J.
A1 - Haupt, M.
A1 - Heinzelmann, G.
A1 - Henri, Gilles
A1 - Hermann, G.
A1 - Hinton, James Anthony
A1 - Hofmann, Werner
A1 - Hoischen, Clemens
A1 - Holch, Tim Lukas
A1 - Holler, M.
A1 - Horns, D.
A1 - Huber, D.
A1 - Iwasaki, H.
A1 - Jacholkowska, A.
A1 - Jamrozy, M.
A1 - Jankowsky, David
A1 - Jankowsky, Felix
A1 - Jouvin, L.
A1 - Jung-Richardt, I.
A1 - Kastendieck, M. A.
A1 - Katarzyński, Krzysztof
A1 - Katsuragawa, M.
A1 - Katz, U.
A1 - Kerszberg, D.
A1 - Khangulyan, D.
A1 - Khelifi, B.
A1 - King, J.
A1 - Klepser, S.
A1 - Kluzniak, W.
A1 - Komin, Nu.
A1 - Kosack, K.
A1 - Krakau, S.
A1 - Kraus, M.
A1 - Kruger, P. P.
A1 - Lamanna, G.
A1 - Lau, J.
A1 - Lefaucheur, J.
A1 - Lemiere, A.
A1 - Lemoine-Goumard, M.
A1 - Lenain, J. -P.
A1 - Leser, Eva
A1 - Lohse, T.
A1 - Lorentz, M.
A1 - Lopez-Coto, R.
A1 - Lypova, I.
A1 - Malyshev, D.
A1 - Marandon, V.
A1 - Marcowith, Alexandre
A1 - Mariaud, C.
A1 - Marti-Devesa, G.
A1 - Marx, R.
A1 - Maurin, G.
A1 - Meintjes, P. J.
A1 - Mitchell, A. M. W.
A1 - Moderski, R.
A1 - Mohamed, M.
A1 - Mohrmann, L.
A1 - Moulin, Emmanuel
A1 - Murach, T.
A1 - Nakashima, S.
A1 - de Naurois, M.
A1 - Ndiyavala, H.
A1 - Niederwanger, F.
A1 - Niemiec, J.
A1 - Oakes, L.
A1 - Odaka, H.
A1 - Ohm, S.
A1 - Ostrowski, M.
A1 - Oya, I.
A1 - Padovani, M.
A1 - Panter, M.
A1 - Parsons, R. D.
A1 - Perennes, C.
A1 - Petrucci, P. -O.
A1 - Peyaud, B.
A1 - Piel, Q.
A1 - Pita, S.
A1 - Poireau, V.
A1 - Noel, A. Priyana
A1 - Prokhorov, D. A.
A1 - Prokoph, H.
A1 - Puehlhofer, G.
A1 - Punch, M.
A1 - Quirrenbach, A.
A1 - Raab, S.
A1 - Rauth, R.
A1 - Reimer, A.
A1 - Reimer, O.
A1 - Renaud, M.
A1 - Rieger, F.
A1 - Rinchiuso, L.
A1 - Romoli, C.
A1 - Rowell, G.
A1 - Rudak, B.
A1 - Ruiz-Velasco, E.
A1 - Sahakian, V.
A1 - Saito, S.
A1 - Sanchez, D. A.
A1 - Santangelo, Andrea
A1 - Sasaki, M.
A1 - Schlickeiser, R.
A1 - Schussler, F.
A1 - Schulz, A.
A1 - Schwanke, U.
A1 - Schwemmer, S.
A1 - Seglar-Arroyo, M.
A1 - Senniappan, M.
A1 - Seyffert, A. S.
A1 - Shafi, N.
A1 - Shilon, I.
A1 - Shiningayamwe, K.
A1 - Simoni, R.
A1 - Sinha, A.
A1 - Sol, H.
A1 - Spanier, F.
A1 - Specovius, A.
A1 - Spir-Jacob, M.
A1 - Stawarz, L.
A1 - Steenkamp, R.
A1 - Stegmann, Christian
A1 - Steppa, Constantin Beverly
A1 - Takahashi, T.
A1 - Tavernet, J. -P.
A1 - Tavernier, T.
A1 - Taylor, A. M.
A1 - Terrier, R.
A1 - Tibaldo, L.
A1 - Tiziani, D.
A1 - Tluczykont, M.
A1 - Trichard, C.
A1 - Tsirou, M.
A1 - Tsuji, N.
A1 - Tuffs, R.
A1 - Uchiyama, Y.
A1 - van der Walt, D. J.
A1 - van Eldik, C.
A1 - van Rensburg, C.
A1 - van Soelen, B.
A1 - Vasileiadis, G.
A1 - Veh, J.
A1 - Venter, C.
A1 - Viana, A.
A1 - Vincent, P.
A1 - Vink, J.
A1 - Voisin, F.
A1 - Voelk, H. J.
A1 - Vuillaume, T.
A1 - Wadiasingh, Z.
A1 - Wagner, S. J.
A1 - Wagner, R. M.
A1 - White, R.
A1 - Wierzcholska, A.
A1 - Yang, R.
A1 - Zaborov, D.
A1 - Zacharias, M.
A1 - Zanin, R.
A1 - Zdziarski, A.
A1 - Zech, Alraune
A1 - Zefi, F.
A1 - Ziegler, A.
A1 - Zorn, J.
A1 - Zywucka, N.
A1 - Cirelli, M.
A1 - Panci, P.
A1 - Sala, F.
A1 - Silk, J.
A1 - Taoso, M.
T1 - Searches for gamma-ray lines and 'pure WIMP' spectra from Dark Matter annihilations in dwarf galaxies with H.E.S.S.
JF - Journal of cosmology and astroparticle physics
N2 - Dwarf spheroidal galaxies are among the most promising targets for detecting signals of Dark Matter (DM) annihilations. The H.E.S.S. experiment has observed five of these systems for a total of about 130 hours. The data are re-analyzed here, and, in the absence of any detected signals, are interpreted in terms of limits on the DM annihilation cross section. Two scenarios are considered: i) DM annihilation into mono-energetic gamma-rays and ii) DM in the form of pure WIMP multiplets that, annihilating into all electroweak bosons, produce a distinctive gamma-ray spectral shape with a high-energy peak at the DM mass and a lower-energy continuum. For case i), upper limits at 95% confidence level of about less than or similar to 3 x 10(-25) cm(3) s(-1) are obtained in the mass range of 400 GeV to 1TeV. For case ii), the full spectral shape of the models is used and several excluded regions are identified, but the thermal masses of the candidates are not robustly ruled out.
KW - dark matter detectors
KW - dark matter experiments
KW - dwarfs galaxies
KW - gamma ray detectors
Y1 - 2018
U6 - https://doi.org/10.1088/1475-7516/2018/11/037
SN - 1475-7516
IS - 11
PB - IOP Publishing Ltd. (Bristol)
CY - Bristol
ER -
TY - JOUR
A1 - Archambault, S.
A1 - Aune, T.
A1 - Behera, B.
A1 - Beilicke, M.
A1 - Benbow, W.
A1 - Berger, K.
A1 - Bird, R.
A1 - Biteau, Jonathan
A1 - Bugaev, V.
A1 - Byrum, K.
A1 - Cardenzana, J. V.
A1 - Cerruti, M.
A1 - Chen, Xuhui
A1 - Ciupik, L.
A1 - Connolly, M. P.
A1 - Cui, Wei
A1 - Dumm, J.
A1 - Errando, M.
A1 - Falcone, A.
A1 - Federici, Simone
A1 - Feng, Q.
A1 - Finley, J. P.
A1 - Fleischhack, H.
A1 - Fortson, L.
A1 - Furniss, A.
A1 - Galante, N.
A1 - Gillanders, G. H.
A1 - Griffin, S.
A1 - Griffiths, S. T.
A1 - Grube, J.
A1 - Gyuk, G.
A1 - Hanna, D.
A1 - Holder, J.
A1 - Hughes, G.
A1 - Humensky, T. B.
A1 - Johnson, C. A.
A1 - Kaaret, P.
A1 - Kertzman, M.
A1 - Khassen, Y.
A1 - Kieda, D.
A1 - Krawczynski, H.
A1 - Krennrich, F.
A1 - Kumar, S.
A1 - Lang, M. J.
A1 - Madhavan, A. S.
A1 - Maier, G.
A1 - McCann, A.
A1 - Meagher, K.
A1 - Moriarty, P.
A1 - Mukherjee, R.
A1 - Nieto, Daniel
A1 - Ong, R. A.
A1 - Otte, A. N.
A1 - Park, N.
A1 - Pohl, Martin
A1 - Popkow, A.
A1 - Prokoph, H.
A1 - Quinn, J.
A1 - Ragan, K.
A1 - Rajotte, J.
A1 - Reyes, L. C.
A1 - Reynolds, P. T.
A1 - Richards, G. T.
A1 - Roache, E.
A1 - Sembroski, G. H.
A1 - Shahinyan, K.
A1 - Staszak, D.
A1 - Telezhinsky, Igor O.
A1 - Tucci, J. V.
A1 - Tyler, J.
A1 - Varlotta, A.
A1 - Vassiliev, V. V.
A1 - Vincent, S.
A1 - Wakely, S. P.
A1 - Weinstein, A.
A1 - Welsing, R.
A1 - Wilhelm, Alina
A1 - Williams, D. A.
A1 - Ackermann, Margit
A1 - Ajello, M.
A1 - Albert, A.
A1 - Baldini, L.
A1 - Bastieri, D.
A1 - Bellazzini, R.
A1 - Bissaldi, E.
A1 - Bregeon, Johan
A1 - Buehler, R.
A1 - Buson, S.
A1 - Caliandro, G. A.
A1 - Cameron, R. A.
A1 - Caraveo, P. A.
A1 - Cavazzuti, E.
A1 - Charles, E.
A1 - Chiang, J.
A1 - Ciprini, S.
A1 - Claus, R.
A1 - Cutini, S.
A1 - de Angelis, A.
A1 - de Palma, F.
A1 - Dermer, C. D.
A1 - Digel, S. W.
A1 - Di Venere, L.
A1 - Drell, P. S.
A1 - Favuzzi, C.
A1 - Franckowiak, A.
A1 - Fusco, P.
A1 - Gargano, F.
A1 - Gasparrini, D.
A1 - Giglietto, N.
A1 - Giordano, F.
A1 - Giroletti, M.
A1 - Grenier, I. A.
A1 - Guiriec, S.
A1 - Jogler, T.
A1 - Kuss, M.
A1 - Larsson, S.
A1 - Latronico, L.
A1 - Longo, F.
A1 - Loparco, F.
A1 - Lubrano, P.
A1 - Madejski, G. M.
A1 - Mayer, M.
A1 - Mazziotta, Mario Nicola
A1 - Michelson, P. F.
A1 - Mizuno, T.
A1 - Monzani, M. E.
A1 - Morselli, Aldo
A1 - Murgia, S.
A1 - Nuss, E.
A1 - Ohsugi, T.
A1 - Ormes, J. F.
A1 - Paneque, D.
A1 - Perkins, J. S.
A1 - Piron, F.
A1 - Pivato, G.
A1 - Raino, S.
A1 - Razzano, M.
A1 - Reimer, A.
A1 - Reimer, Olaf
A1 - Ritz, S.
A1 - Schaal, M.
A1 - Sgro, C.
A1 - Siskind, E. J.
A1 - Spinelli, P.
A1 - Takahashi, H.
A1 - Tibaldo, L.
A1 - Tinivella, M.
A1 - Troja, E.
A1 - Vianello, G.
A1 - Werner, M.
A1 - Wood, M.
T1 - Deep broadband observations of the distant gamma-ray blazar PKS 1424+240
JF - The astrophysical journal : an international review of spectroscopy and astronomical physics ; Part 2, Letters
N2 - We present deep VERITAS observations of the blazar PKS 1424+240, along with contemporaneous Fermi Large Area Telescope, Swift X-ray Telescope, and Swift UV Optical Telescope data between 2009 February 19 and 2013 June 8. This blazar resides at a redshift of z >= 0.6035, displaying a significantly attenuated gamma-ray flux above 100 GeV due to photon absorption via pair-production with the extragalactic background light. We present more than 100 hr of VERITAS observations over three years, a multiwavelength light curve, and the contemporaneous spectral energy distributions. The source shows a higher flux of (2.1 +/- 0.3) x 10(-7) photons m(-2) s(-1) above 120 GeV in 2009 and 2011 as compared to the flux measured in 2013, corresponding to (1.02 +/- 0.08) x 10-7 photons m(-2) s(-1) above 120 GeV. The measured differential very high energy (VHE; E >= 100 GeV) spectral indices are Gamma = 3.8 +/- 0.3, 4.3 +/- 0.6 and 4.5 +/- 0.2 in 2009, 2011, and 2013, respectively. No significant spectral change across the observation epochs is detected. We find no evidence for variability at gamma-ray opacities of greater than tau = 2, where it is postulated that any variability would be small and occur on timescales longer than a year if hadronic cosmic-ray interactions with extragalactic photon fields provide a secondary VHE photon flux. The data cannot rule out such variability due to low statistics.
KW - BL Lacertae objects: individual (PKS 1424+240)-cosmic background radiation
KW - gamma rays: galaxies
Y1 - 2014
U6 - https://doi.org/10.1088/2041-8205/785/1/L16
SN - 2041-8205
SN - 2041-8213
VL - 785
IS - 1
PB - IOP Publ. Ltd.
CY - Bristol
ER -
TY - JOUR
A1 - Abdalla, Hassan E.
A1 - Abramowski, Attila
A1 - Aharonian, Felix A.
A1 - Benkhali, Faiçal Ait
A1 - Akhperjanian, A. G.
A1 - Angüner, Ekrem Oǧuzhan
A1 - Arrieta, M.
A1 - Aubert, Pierre
A1 - Backes, Michael
A1 - Balzer, Arnim
A1 - Barnard, Michelle
A1 - Becherini, Yvonne
A1 - Tjus, Julia Becker
A1 - Berge, David
A1 - Bernhard, Sabrina
A1 - Bernlöhr, K.
A1 - Birsin, E.
A1 - Blackwell, R.
A1 - Bottcher, Markus
A1 - Boisson, Catherine
A1 - Bolmont, J.
A1 - Bordas, Pol
A1 - Bregeon, Johan
A1 - Brun, Francois
A1 - Brun, Pierre
A1 - Bryan, Mark
A1 - Bulik, Tomasz
A1 - Capasso, M.
A1 - Carr, John
A1 - Casanova, Sabrina
A1 - Chakraborty, N.
A1 - Chalme-Calvet, R.
A1 - Chaves, Ryan C. G.
A1 - Chen, Andrew
A1 - Chevalier, J.
A1 - Chretien, M.
A1 - Colafrancesco, Sergio
A1 - Cologna, Gabriele
A1 - Condon, B.
A1 - Conrad, Jan
A1 - Couturier, C.
A1 - Cui, Y.
A1 - Davids, I. D.
A1 - Degrange, B.
A1 - Deil, Christoph
A1 - deWilt, P.
A1 - Djannati-Atai, Arache
A1 - Domainko, Wilfried
A1 - Donath, Axel
A1 - Dubus, Guillaume
A1 - Dutson, Kate
A1 - Dyks, J.
A1 - Dyrda, M.
A1 - Edwards, T.
A1 - Egberts, Kathrin
A1 - Eger, P.
A1 - Ernenwein, J. -P.
A1 - Eschbach, S.
A1 - Farnier, C.
A1 - Fegan, Stuart
A1 - Fernandes, M. V.
A1 - Fiasson, A.
A1 - Fontaine, G.
A1 - Foerster, A.
A1 - Funk, S.
A1 - Füßling, Matthias
A1 - Gabici, Stefano
A1 - Gajdus, M.
A1 - Gallant, Y. A.
A1 - Garrigoux, T.
A1 - Giavitto, Gianluca
A1 - Giebels, B.
A1 - Glicenstein, J. F.
A1 - Gottschall, Daniel
A1 - Goyal, A.
A1 - Grondin, M. -H.
A1 - Grudzinska, M.
A1 - Hadasch, Daniela
A1 - Hahn, J.
A1 - Hawkes, J.
A1 - Heinzelmann, G.
A1 - Henri, Gilles
A1 - Hermann, G.
A1 - Hervet, Olivier
A1 - Hillert, A.
A1 - Hinton, James Anthony
A1 - Hofmann, Werner
A1 - Hoischen, Clemens
A1 - Holler, M.
A1 - Horns, D.
A1 - Ivascenko, Alex
A1 - Jacholkowska, A.
A1 - Jamrozy, Marek
A1 - Janiak, M.
A1 - Jankowsky, D.
A1 - Jankowsky, Felix
A1 - Jingo, M.
A1 - Jogler, Tobias
A1 - Jouvin, Lea
A1 - Jung-Richardt, Ira
A1 - Kastendieck, M. A.
A1 - Katarzynski, Krzysztof
A1 - Katz, Uli
A1 - Kerszberg, D.
A1 - Khelifi, B.
A1 - Kieffer, M.
A1 - King, J.
A1 - Klepser, S.
A1 - Klochkov, Dmitry
A1 - Kluzniak, W.
A1 - Kolitzus, D.
A1 - Komin, Nu.
A1 - Kosack, K.
A1 - Krakau, S.
A1 - Kraus, Michael
A1 - Krayzel, F.
A1 - Kruger, P. P.
A1 - Laffon, H.
A1 - Lamanna, G.
A1 - Lau, Jeanie
A1 - Lees, J. -P.
A1 - Lefaucheur, J.
A1 - Lefranc, V.
A1 - Lemiere, A.
A1 - Lemoine-Goumard, M.
A1 - Lenain, J. -P.
A1 - Leser, Eva
A1 - Lohse, Thomas
A1 - Lorentz, M.
A1 - Lui, R.
A1 - Lypova, Iryna
A1 - Marandon, Vincent
A1 - Marcowith, Alexandre
A1 - Mariaud, C.
A1 - Marx, R.
A1 - Maurin, G.
A1 - Maxted, N.
A1 - Mayer, Michael
A1 - Meintjes, Petrus Johannes
A1 - Menzler, U.
A1 - Meyer, Manuel
A1 - Mitchell, A. M. W.
A1 - Moderski, R.
A1 - Mohamed, M.
A1 - Mora, K.
A1 - Moulin, Emmanuel
A1 - Murach, T.
A1 - de Naurois, Mathieu
A1 - Niederwanger, F.
A1 - Niemiec, J.
A1 - Oakes, L.
A1 - Odaka, Hirokazu
A1 - Ohm, Stefan
A1 - Oettl, S.
A1 - Ostrowski, M.
A1 - Oya, I.
A1 - Padovani, Marco
A1 - Panter, M.
A1 - Parsons, R. D.
A1 - Arribas, M. Paz
A1 - Pekeur, N. W.
A1 - Pelletier, G.
A1 - Petrucci, P. -O.
A1 - Peyaud, B.
A1 - Pita, S.
A1 - Poon, Helen
A1 - Prokhorov, Dmitry
A1 - Prokoph, Heike
A1 - Puehlhofer, Gerd
A1 - Punch, Michael
A1 - Quirrenbach, Andreas
A1 - Raab, S.
A1 - Reimer, Anita
A1 - Reimer, Olaf
A1 - Renaud, M.
A1 - de los Reyes, R.
A1 - Rieger, Frank
A1 - Romoli, Carlo
A1 - Rosier-Lees, S.
A1 - Rowell, G.
A1 - Rudak, B.
A1 - Rulten, C. B.
A1 - Sahakian, V.
A1 - Salek, David
A1 - Sanchez, David A.
A1 - Santangelo, Andrea
A1 - Sasaki, Manami
A1 - Schlickeiser, Reinhard
A1 - Schussler, F.
A1 - Schulz, Andreas
A1 - Schwanke, U.
A1 - Schwemmer, S.
A1 - Seyffert, A. S.
A1 - Shafi, N.
A1 - Simoni, R.
A1 - Sol, H.
A1 - Spanier, Felix
A1 - Spengler, G.
A1 - Spiess, F.
A1 - Stawarz, Lukasz
A1 - Steenkamp, R.
A1 - Stegmann, Christian
A1 - Stinzing, F.
A1 - Stycz, K.
A1 - Sushch, Iurii
A1 - Tavernet, J. -P.
A1 - Tavernier, T.
A1 - Taylor, A. M.
A1 - Terrier, R.
A1 - Tluczykont, Martin
A1 - Trichard, C.
A1 - Tuffs, R.
A1 - van der Walt, Johan
A1 - van Eldik, Christopher
A1 - van Soelen, Brian
A1 - Vasileiadis, Georges
A1 - Veh, J.
A1 - Venter, C.
A1 - Viana, A.
A1 - Vincent, P.
A1 - Vink, Jacco
A1 - Voisin, F.
A1 - Voelk, Heinrich J.
A1 - Vuillaume, Thomas
A1 - Wadiasingh, Z.
A1 - Wagner, Stefan J.
A1 - Wagner, P.
A1 - Wagner, R. M.
A1 - White, R.
A1 - Wierzcholska, Alicja
A1 - Willmann, P.
A1 - Woernlein, A.
A1 - Wouters, Denis
A1 - Yang, R.
A1 - Zabalza, Victor
A1 - Zaborov, D.
A1 - Zacharias, M.
A1 - Zdziarski, A. A.
A1 - Zech, Andreas
A1 - Zefi, F.
A1 - Ziegler, A.
A1 - Zywucka, Natalia
T1 - Search for Dark Matter Annihilations towards the Inner Galactic Halo from 10 Years of Observations with HESS
JF - Physical review letters
N2 - The inner region of the Milky Way halo harbors a large amount of dark matter (DM). Given its proximity, it is one of the most promising targets to look for DM. We report on a search for the annihilations of DM particles using gamma-ray observations towards the inner 300 pc of the Milky Way, with the H.E.S.S. array of ground-based Cherenkov telescopes. The analysis is based on a 2D maximum likelihood method using Galactic Center (GC) data accumulated by H.E.S.S. over the last 10 years (2004-2014), and does not show any significant gamma-ray signal above background. Assuming Einasto and Navarro-Frenk-White DM density profiles at the GC, we derive upper limits on the annihilation cross section . These constraints are the strongest obtained so far in the TeV DM mass range and improve upon previous limits by a factor 5. For the Einasto profile, the constraints reach values of 6 x 10(-26) cm(3) s(-1) in the W+W- channel for a DM particle mass of 1.5 TeV, and 2 x 10(-26) cm(3) s(-1) in the tau(+)tau(-) channel for a 1 TeV mass. For the first time, ground-based gamma-ray observations have reached sufficient sensitivity to probe values expected from the thermal relic density for TeV DM particles.
Y1 - 2016
U6 - https://doi.org/10.1103/PhysRevLett.117.111301
SN - 0031-9007
SN - 1079-7114
VL - 117
PB - American Physical Society
CY - College Park
ER -
TY - GEN
A1 - Abramowski, Attila
A1 - Aharonian, Felix A.
A1 - Benkhali, Faical Ait
A1 - Akhperjanian, A. G.
A1 - Angüner, Ekrem Oǧuzhan
A1 - Backes, Michael
A1 - Balenderan, Shangkari
A1 - Balzer, Arnim
A1 - Barnacka, Anna
A1 - Becherini, Yvonne
A1 - Tjus, Julia Becker
A1 - Berge, David
A1 - Bernhard, Sabrina
A1 - Bernlöhr, Konrad
A1 - Birsin, E.
A1 - Biteau, Jonathan
A1 - Böttcher, Markus
A1 - Boisson, Catherine
A1 - Bolmont, J.
A1 - Bordas, Pol
A1 - Bregeon, Johan
A1 - Brun, Francois
A1 - Brun, Pierre
A1 - Bryan, Mark
A1 - Bulik, Tomasz
A1 - Carrigan, Svenja
A1 - Casanova, Sabrina
A1 - Chadwick, Paula M.
A1 - Chakraborty, Nachiketa
A1 - Chalme-Calvet, R.
A1 - Chaves, Ryan C. G.
A1 - Chretien, M.
A1 - Colafrancesco, Sergio
A1 - Cologna, Gabriele
A1 - Conrad, Jan
A1 - Couturier, Claire
A1 - Cui, Yudong
A1 - Davids, Isak Delberth
A1 - Degrange, Bernhard
A1 - Deil, Christoph
A1 - deWilt, P.
A1 - Djannati-Ataï, A.
A1 - Domainko, Wilfried
A1 - Donath, Axel
A1 - Dubus, G.
A1 - Dutson, K.
A1 - Dyks, J.
A1 - Dyrda, M.
A1 - Edwards, Tanya
A1 - Egberts, Kathrin
A1 - Eger, Peter
A1 - Espigat, P.
A1 - Farnier, C.
A1 - Fegan, Stephen
A1 - Feinstein, Fabrice
A1 - Fernandes, Milton Virgilio
A1 - Fernandez, Diane
A1 - Fiasson, A.
A1 - Fontaine, Gerard
A1 - Förster, Andreas
A1 - Fuessling, M.
A1 - Gabici, S.
A1 - Gajdus, M.
A1 - Gallant, Yves A.
A1 - Garrigoux, Tania
A1 - Giavitto, G.
A1 - Giebels, Berrie
A1 - Glicenstein, Jean-Francois
A1 - Gottschall, Daniel
A1 - Grondin, M. -H.
A1 - Grudzinska, M.
A1 - Hadasch, Daniela
A1 - Haeffner, S.
A1 - Hahn, Joachim
A1 - Harris, Jonathan
A1 - Heinzelmann, Götz
A1 - Henri, G.
A1 - Hermann, German
A1 - Hervet, O.
A1 - Hillert, Andreas
A1 - Hinton, James Anthony
A1 - Hofmann, Werner
A1 - Hofverberg, Petter
A1 - Holler, Markus
A1 - Horns, Dieter
A1 - Ivascenko, Alex
A1 - Jacholkowska, A.
A1 - Jahn, C.
A1 - Jamrozy, Marek
A1 - Janiak, M.
A1 - Jankowsky, F.
A1 - Jung-Richardt, I.
A1 - Kastendieck, Max Anton
A1 - Katarzynski, K.
A1 - Katz, U.
A1 - Kaufmann, S.
A1 - Khelifi, B.
A1 - Kieffer, Michel
A1 - Klepser, S.
A1 - Klochkov, Dmitry
A1 - Kluzniak, W.
A1 - Kolitzus, David
A1 - Komin, Nu
A1 - Kosack, Karl
A1 - Krakau, Steffen
A1 - Krayzel, F.
A1 - Krueger, Pat P.
A1 - Laffon, H.
A1 - Lamanna, G.
A1 - Lefaucheur, J.
A1 - Lefranc, Valentin
A1 - Lemiere, A.
A1 - Lemoine-Goumard, M.
A1 - Lenain, J. -P.
A1 - Lohse, Thomas
A1 - Lopatin, A.
A1 - Lu, Chia-Chun
A1 - Marandon, Vincent
A1 - Marcowith, Alexandre
A1 - Marx, Ramin
A1 - Maurin, G.
A1 - Maxted, Nigel
A1 - Mayer, Michael
A1 - McComb, T. J. Lowry
A1 - Mehault, J.
A1 - Meintjes, P. J.
A1 - Menzler, Ulf
A1 - Meyer, M.
A1 - Mitchell, Alison M. W.
A1 - Moderski, R.
A1 - Mohamed, M.
A1 - Mora, K.
A1 - Moulin, Emmanuel
A1 - Murach, Thomas
A1 - de Naurois, Mathieu
A1 - Niemiec, J.
A1 - Nolan, Sam J.
A1 - Oakes, Louise
A1 - Odaka, Hirokazu
A1 - Ohm, S.
A1 - Optiz, Björn
A1 - Ostrowski, Michal
A1 - Oya, I.
A1 - Panter, Michael
A1 - Parsons, R. Daniel
A1 - Arribas, M. Paz
A1 - Pekeur, Nikki W.
A1 - Pelletier, G.
A1 - Petrucci, P. -O.
A1 - Peyaud, B.
A1 - Pita, S.
A1 - Poon, Helen
A1 - Pühlhofer, Gerd
A1 - Punch, M.
A1 - Quirrenbach, A.
A1 - Raab, S.
A1 - Reichardt, I.
A1 - Reimer, Anita
A1 - Reimer, Olaf
A1 - Renaud, Metz
A1 - de los Reyes, Raquel
A1 - Rieger, Frank
A1 - Romoli, C.
A1 - Rosier-Lees, S.
A1 - Rowell, G.
A1 - Rudak, B.
A1 - Rulten, C. B.
A1 - Sahakian, Vardan
A1 - Salek, D.
A1 - Sanchez, David M.
A1 - Santangelo, Andrea
A1 - Schlickeiser, Reinhard
A1 - Schuessler, F.
A1 - Schulz, A.
A1 - Schwanke, Ullrich
A1 - Schwarzburg, S.
A1 - Schwemmer, S.
A1 - Sol, H.
A1 - Spanier, Felix
A1 - Spengler, G.
A1 - Spies, Franziska
A1 - Stawarz, Lukasz
A1 - Steenkamp, Riaan
A1 - Stegmann, Christian
A1 - Stinzing, F.
A1 - Stycz, K.
A1 - Sushch, Iurii
A1 - Tavernet, J. -P.
A1 - Tavernier, T.
A1 - Taylor, A. M.
A1 - Terrier, R.
A1 - Tluczykont, Martin
A1 - Trichard, C.
A1 - Valerius, K.
A1 - van Eldik, C.
A1 - van Soelen, B.
A1 - Vasileiadis, Georges
A1 - Veh, J.
A1 - Venter, Christo
A1 - Viana, Aion
A1 - Vincent, P.
A1 - Vink, Jacco
A1 - Völk, Heinrich J.
A1 - Volpe, Francesca
A1 - Vorster, Martine
A1 - Vuillaume, T.
A1 - Wagner, S. J.
A1 - Wagner, P.
A1 - Wagner, R. M.
A1 - Ward, Martin
A1 - Weidinger, Matthias
A1 - Weitzel, Quirin
A1 - White, R.
A1 - Wierzcholska, A.
A1 - Willmann, P.
A1 - Woernlein, A.
A1 - Wouters, D.
A1 - Yang, Ruizhi
A1 - Zabalza, Victor
A1 - Zaborov, Dmitry
A1 - Zacharias, M.
A1 - Zdziarski, A. A.
A1 - Zech, Alraune
A1 - Zechlin, Hannes -S.
T1 - H.E.S.S. detection of TeV emission from the interaction region between the supernova remnant G349.7+0.2 and a molecular cloud (vol 574, A100, 2015)
T2 - Astronomy and astrophysics : an international weekly journal
KW - gamma rays: general
KW - ISM: supernova remnants
KW - ISM: clouds
KW - errata, addenda
Y1 - 2015
U6 - https://doi.org/10.1051/0004-6361/201425070e
SN - 1432-0746
VL - 580
PB - EDP Sciences
CY - Les Ulis
ER -
TY - JOUR
A1 - Asghari, N.
A1 - Broeg, C.
A1 - Carone, L.
A1 - Casas-Miranda, R.
A1 - Palacio, J. C. C.
A1 - Csillik, I.
A1 - Dvorak, R.
A1 - Freistetter, F.
A1 - Hadjivantsides, G.
A1 - Hussmann, H.
A1 - Khramova, A.
A1 - Khristoforova, M.
A1 - Khromova, I.
A1 - Kitiashivilli, I.
A1 - Kozlowski, S.
A1 - Laakso, T.
A1 - Laczkowski, T.
A1 - Lytvinenko, D.
A1 - Miloni, O.
A1 - Morishima, R.
A1 - Moro-Martin, A.
A1 - Paksyutov, V.
A1 - Pal, A.
A1 - Patidar, V.
A1 - Pecnik, B.
A1 - Peles, O.
A1 - Pyo, J.
A1 - Quinn, T.
A1 - Rodriguez, A.
A1 - Romano, C.
A1 - Saikia, E.
A1 - Stadel, J.
A1 - Thiel, M.
A1 - Todorovic, N.
A1 - Veras, D.
A1 - Neto, E. V.
A1 - Vilagi, J.
A1 - von Bloh, Werner
A1 - Zechner, R.
A1 - Zhuchkova, E.
T1 - Stability of terrestrial planets in the habitable zone of G1 777 A, HD 72659, G1 614, 47 Uma and HD 4208
N2 - We have undertaken a thorough dynamical investigation of five extrasolar planetary systems using extensive numerical experiments. The systems Gl 777 A, HD 72659, Gl 614, 47 Uma and HD 4208 were examined concerning the question of whether they could host terrestrial-like planets in their habitable zones (HZ). First we investigated the mean motion resonances between fictitious terrestrial planets and the existing gas giants in these five extrasolar systems. Then a fine grid of initial conditions for a potential terrestrial planet within the HZ was chosen for each system, from which the stability of orbits was then assessed by direct integrations over a time interval of 1 million years. For each of the five systems the 2-dimensional grid of initial conditions contained 80 eccentricity points for the Jovian planet and up to 160 semimajor axis points for the fictitious planet. The computations were carried out using a Lie-series integration method with an adaptive step size control. This integration method achieves machine precision accuracy in a highly efficient and robust way, requiring no special adjustments when the orbits have large eccentricities. The stability of orbits was examined with a determination of the Renyi entropy, estimated from recurrence plots, and with a more straightforward method based on the maximum eccentricity achieved by the planet over the 1 million year integration. Additionally, the eccentricity is an indication of the habitability of a terrestrial planet in the HZ; any value of e > 0.2 produces a significant temperature difference on a planet's surface between apoapse and periapse. The results for possible stable orbits for terrestrial planets in habitable zones for the five systems are: for Gl 777 A nearly the entire HZ is stable, for 47 Uma, HD 72659 and HD 4208 terrestrial planets can survive for a sufficiently long time, while for Gl 614 our results exclude terrestrial planets moving in stable orbits within the HZ. Studies such as this one are of primary interest to future space missions dedicated to finding habitable terrestrial planets in other stellar systems. Assessing the likelihood of other habitable planets, and more generally the possibility of other life, is the central question of astrobiology today. Our investigation indicates that, from the dynamical point of view, habitable terrestrial planets seem to be compatible with many of the currently discovered extrasolar systems
Y1 - 2004
UR - http://www.aanda.org/
U6 - https://doi.org/10.1051/0004-6361:20040390
SN - 0004-6361
ER -
TY - JOUR
A1 - Brentrup, Jennifer A.
A1 - Williamson, Craig E.
A1 - Colom-Montero, William
A1 - Eckert, Werner
A1 - de Eyto, Elvira
A1 - Grossart, Hans-Peter
A1 - Huot, Yannick
A1 - Isles, Peter D. F.
A1 - Knoll, Lesley B.
A1 - Leach, Taylor H.
A1 - McBride, Chris G.
A1 - Pierson, Don
A1 - Pomati, Francesco
A1 - Read, Jordan S.
A1 - Rose, Kevin C.
A1 - Samal, Nihar R.
A1 - Staehr, Peter A.
A1 - Winslow, Luke A.
T1 - The potential of high-frequency profiling to assess vertical and seasonal patterns of phytoplankton dynamics in lakes: an extension of the Plankton Ecology Group (PEG) model
JF - Inland waters : journal of the International Society of Limnology
N2 - The use of high-frequency sensors on profiling buoys to investigate physical, chemical, and biological processes in lakes is
increasing rapidly. Profiling buoys with automated winches and sensors that collect high-frequency chlorophyll fluorescence
(ChlF) profiles in 11 lakes in the Global Lake Ecological Observatory Network (GLEON) allowed the study of the vertical
and temporal distribution of ChlF, including the formation of subsurface chlorophyll maxima (SSCM). The effectiveness of 3
methods for sampling phytoplankton distributions in lakes, including (1) manual profiles, (2) single-depth buoys, and (3)
profiling buoys were assessed. High-frequency ChlF surface data and profiles were compared to predictions from the
Plankton Ecology Group (PEG) model. The depth-integrated ChlF dynamics measured by the profiling buoy data revealed a
greater complexity that neither conventional sampling nor the generalized PEG model captured. Conventional sampling
techniques would have missed SSCM in 7 of 11 study lakes. Although surface-only ChlF data underestimated average water
column ChlF, at times by nearly 2-fold in 4 of the lakes, overall there was a remarkable similarity between surface and mean
water column data. Contrary to the PEG model’s proposed negligible role for physical control of phytoplankton during the
growing season, thermal structure and light availability were closely associated with ChlF seasonal depth distribution. Thus,
an extension of the PEG model is proposed, with a new conceptual framework that explicitly includes physical metrics to
better predict SSCM formation in lakes and highlight when profiling buoys are especially informative.
KW - chlorophyll fluorescence
KW - Global Lake Ecological Observatory Network (GLEON)
KW - high-frequency sensors
KW - PEG model
KW - phytoplankton
KW - profiling buoys
KW - subsurface chlorophyll maximum
Y1 - 2016
U6 - https://doi.org/10.5268/IW-6.4.890
SN - 2044-2041
SN - 2044-205X
VL - 6
SP - 565
EP - 580
PB - Freshwater Biological Association
CY - Ambleside
ER -
TY - JOUR
A1 - Werner, Klaus
A1 - Barstow, Martin A.
A1 - Holberg, J. B.
A1 - Koester, D.
A1 - Nousek, J. A.
T1 - Extreme ultraviolet spectroscopy of white dwarfs
Y1 - 1994
ER -
TY - JOUR
A1 - Bürger, Gerd
A1 - Sobie, S. R.
A1 - Cannon, A. J.
A1 - Werner, A. T.
A1 - Murdock, T. Q.
T1 - Downscaling extremes an intercomparison of multiple methods for future climate
JF - Journal of climate
N2 - This study follows up on a previous downscaling intercomparison for present climate. Using a larger set of eight methods the authors downscale atmospheric fields representing present (1981-2000) and future (2046-65) conditions, as simulated by six global climate models following three emission scenarios. Local extremes were studied at 20 locations in British Columbia as measured by the same set of 27 indices, ClimDEX, as in the precursor study. Present and future simulations give 2 x 3 x 6 x 8 x 20 x 27 = 155 520 index climatologies whose analysis in terms of mean change and variation is the purpose of this study. The mean change generally reinforces what is to be expected in a warmer climate: that extreme cold events become less frequent and extreme warm events become more frequent, and that there are signs of more frequent precipitation extremes. There is considerable variation, however, about this tendency, caused by the influence of scenario, climate model, downscaling method, and location. This is analyzed using standard statistical techniques such as analysis of variance and multidimensional scaling, along with an assessment of the influence of each modeling component on the overall variation of the simulated change. It is found that downscaling generally has the strongest influence, followed by climate model; location and scenario have only a minor influence. The influence of downscaling could be traced back in part to various issues related to the methods, such as the quality of simulated variability or the dependence on predictors. Using only methods validated in the precursor study considerably reduced the influence of downscaling, underpinning the general need for method verification.
Y1 - 2013
U6 - https://doi.org/10.1175/JCLI-D-12-00249.1
SN - 0894-8755
VL - 26
IS - 10
SP - 3429
EP - 3449
PB - American Meteorological Soc.
CY - Boston
ER -
TY - JOUR
A1 - Soliveres, Santiago
A1 - Maestre, Fernando T.
A1 - Ulrich, Werner
A1 - Manning, Peter
A1 - Boch, Steffen
A1 - Bowker, Matthew A.
A1 - Prati, Daniel
A1 - Delgado-Baquerizo, Manuel
A1 - Quero, Jose L.
A1 - Schöning, Ingo
A1 - Gallardo, Antonio
A1 - Weisser, Wolfgang W.
A1 - Müller, Jörg
A1 - Socher, Stephanie A.
A1 - Garcia-Gomez, Miguel
A1 - Ochoa, Victoria
A1 - Schulze, Ernst-Detlef
A1 - Fischer, Markus
A1 - Allan, Eric
T1 - Intransitive competition is widespread in plant communities and maintains their species richness
JF - Ecology letters
N2 - Intransitive competition networks, those in which there is no single best competitor, may ensure species coexistence. However, their frequency and importance in maintaining diversity in real-world ecosystems remain unclear. We used two large data sets from drylands and agricultural grasslands to assess: (1) the generality of intransitive competition, (2) intransitivity-richness relationships and (3) effects of two major drivers of biodiversity loss (aridity and land-use intensification) on intransitivity and species richness. Intransitive competition occurred in >65% of sites and was associated with higher species richness. Intransitivity increased with aridity, partly buffering its negative effects on diversity, but was decreased by intensive land use, enhancing its negative effects on diversity. These contrasting responses likely arise because intransitivity is promoted by temporal heterogeneity, which is enhanced by aridity but may decline with land-use intensity. We show that intransitivity is widespread in nature and increases diversity, but it can be lost with environmental homogenisation.
KW - Aridity
KW - biodiversity
KW - coexistence
KW - drylands
KW - land use
KW - mesic grasslands
KW - rock-paper-scissors game
Y1 - 2015
U6 - https://doi.org/10.1111/ele.12456
SN - 1461-023X
SN - 1461-0248
VL - 18
IS - 8
SP - 790
EP - 798
PB - Wiley-Blackwell
CY - Hoboken
ER -
TY - JOUR
A1 - Stracke, A.
A1 - Bayer, A.
A1 - Zimmermann, S.
A1 - Wendorff, Joachim Heinz
A1 - Wirges, Werner
A1 - Bauer-Gogonea, Simona
A1 - Bauer, Siegfried
A1 - Gerhard, Reimund
T1 - Relaxation behaviour of electrically induced polar orientation and of optically induced non-polar orientation in an azo-chromophore side group polymer
Y1 - 1999
SN - 0022-3727
ER -
TY - JOUR
A1 - Rosenhahn, Axel
A1 - Finlay, John A.
A1 - Pettit, Michala E.
A1 - Ward, Andy
A1 - Wirges, Werner
A1 - Gerhard, Reimund
A1 - Callow, Maureen E.
A1 - Grunze, Michael
A1 - Callow, James A.
T1 - Zeta potential of motile spores of the green alga Ulva linza and the influence of electrostatic interactions on spore settlement and adhesion strength
N2 - The zeta potential of the motile spores of the green alga (seaweed) Ulva linza was quantified by video microscopy in combination with optical tweezers and determined to be -19.3ñ1.1 mV. The electrostatic component involved in the settlement and adhesion of spores was studied using electret surfaces consisting of PTFE and bearing different net charges. As the surface chemistry remains the same for differently charged surfaces, the experimental results isolate the influence of surface charge and thus electrostatic interactions. Ulva spores were demonstrated to have a reduced tendency to settle on negatively charged surfaces and when they did settle the adhesion strength of settled spores was lower than with neutral or positively charged surfaces. These observations can be ascribed to electrostatic interactions.
Y1 - 2009
UR - http://biointerphases.org/
U6 - https://doi.org/10.1116/1.3110182
SN - 1559-4106
ER -
TY - JOUR
A1 - Ramiaramanantsoa, Tahina
A1 - Ratnasingam, Rathish
A1 - Shenar, Tomer
A1 - Moffat, Anthony F. J.
A1 - Rogers, Tamara M.
A1 - Popowicz, Adam
A1 - Kuschnig, Rainer
A1 - Pigulski, Andrzej
A1 - Handler, Gerald
A1 - Wade, Gregg A.
A1 - Zwintz, Konstanze
A1 - Weiss, Werner W.
T1 - A BRITE view on the massive O-type supergiant V973 Scorpii
BT - hints towards internal gravity waves or sub-surface convection zones
JF - Monthly notices of the Royal Astronomical Society
N2 - Stochastically triggered photospheric light variations reaching similar to 40 mmag peak-to-valley amplitudes have been detected in the O8 Iaf supergiant V973 Scorpii as the outcome of 2 months of high-precision time-resolved photometric observations with the BRIght Target Explorer (BRITE) nanosatellites. The amplitude spectrum of the time series photometry exhibits a pronounced broad bump in the low-frequency regime (less than or similar to 0.9 d(-1)) where several prominent frequencies are detected. A time-frequency analysis of the observations reveals typical mode lifetimes of the order of 5-10 d. The overall features of the observed brightness amplitude spectrum of V973 Sco match well with those extrapolated from two-dimensional hydrodynamical simulations of convectively driven internal gravity waves randomly excited from deep in the convective cores of massive stars. An alternative or additional possible source of excitation from a sub-surface convection zone needs to be explored in future theoretical investigations.
KW - convection
KW - waves
KW - techniques: photometric
KW - stars: massive
KW - supergiants
Y1 - 2018
U6 - https://doi.org/10.1093/mnras/sty1897
SN - 0035-8711
SN - 1365-2966
VL - 480
IS - 1
SP - 972
EP - 986
PB - Oxford Univ. Press
CY - Oxford
ER -
TY - JOUR
A1 - Ramiaramanantsoa, Tahina
A1 - Moffat, Anthony F. J.
A1 - Harmon, Robert
A1 - Ignace, R.
A1 - St-Louis, Nicole
A1 - Vanbeveren, Dany
A1 - Shenar, Tomer
A1 - Pablo, Herbert
A1 - Richardson, Noel D.
A1 - Howarth, Ian D.
A1 - Stevens, Ian R.
A1 - Piaulet, Caroline
A1 - St-Jean, Lucas
A1 - Eversberg, Thomas
A1 - Pigulski, Andrzej
A1 - Popowicz, Adam
A1 - Kuschnig, Rainer
A1 - Zoclonska, Elzbieta
A1 - Buysschaert, Bram
A1 - Handler, Gerald
A1 - Weiss, Werner W.
A1 - Wade, Gregg A.
A1 - Rucinski, Slavek M.
A1 - Zwintz, Konstanze
A1 - Luckas, Paul
A1 - Heathcote, Bernard
A1 - Cacella, Paulo
A1 - Powles, Jonathan
A1 - Locke, Malcolm
A1 - Bohlsen, Terry
A1 - Chené, André-Nicolas
A1 - Miszalski, Brent
A1 - Waldron, Wayne L.
A1 - Kotze, Marissa M.
A1 - Kotze, Enrico J.
A1 - Böhm, Torsten
T1 - BRITE-Constellation high-precision time-dependent photometry of the early O-type supergiant zeta Puppis unveils the photospheric drivers of its small- and large-scale wind structures
JF - Monthly notices of the Royal Astronomical Society
N2 - From 5.5 months of dual-band optical photometric monitoring at the 1 mmag level, BRITE-Constellation has revealed two simultaneous types of variability in the O4I(n)fp star ζ Puppis: one single periodic non-sinusoidal component superimposed on a stochastic component. The monoperiodic component is the 1.78-d signal previously detected by Coriolis/Solar Mass Ejection Imager, but this time along with a prominent first harmonic. The shape of this signal changes over time, a behaviour that is incompatible with stellar oscillations but consistent with rotational modulation arising from evolving bright surface inhomogeneities. By means of a constrained non-linear light-curve inversion algorithm, we mapped the locations of the bright surface spots and traced their evolution. Our simultaneous ground-based multisite spectroscopic monitoring of the star unveiled cyclical modulation of its He ii λ4686 wind emission line with the 1.78-d rotation period, showing signatures of corotating interaction regions that turn out to be driven by the bright photospheric spots observed by BRITE. Traces of wind clumps are also observed in the He ii λ4686 line and are correlated with the amplitudes of the stochastic component of the light variations probed by BRITE at the photosphere, suggesting that the BRITE observations additionally unveiled the photospheric drivers of wind clumps in ζ Pup and that the clumping phenomenon starts at the very base of the wind. The origins of both the bright surface inhomogeneities and the stochastic light variations remain unknown, but a subsurface convective zone might play an important role in the generation of these two types of photospheric variability.
KW - techniques: photometric
KW - techniques: spectroscopic
KW - stars: massive
KW - stars: rotation
KW - starspots
KW - supergiants
KW - stars: winds, outflows
Y1 - 2017
U6 - https://doi.org/10.1093/mnras/stx2671
SN - 0035-8711
SN - 1365-2966
VL - 473
IS - 4
SP - 5532
EP - 5569
PB - Oxford Univ. Press
CY - Oxford
ER -
TY - JOUR
A1 - Böhm, Uwe
A1 - Kucken, M.
A1 - Hauffe, D.
A1 - Gerstengarbe, F. W.
A1 - Werner, P. C.
A1 - Flechsig, M.
A1 - Keuler, K.
A1 - Block, A.
A1 - Ahrens, W.
A1 - Nocke, T.
T1 - Reliability of regional climate model simulations of extremes and of long-term climate
N2 - We present two case studies that demonstrate how a common evaluation methodology can be used to assess the reliability of regional climate model simulations from different fields of research. In Case I, we focused on the agricultural yield loss risk for maize in Northeastern Brazil during a drought linked to an El-Nino event. In Case II, the present-day regional climatic conditions in Europe for a 10-year period are simulated. To comprehensively evaluate the model results for both kinds of investigations, we developed a general methodology. On its basis, we elaborated and implemented modules to assess the quality of model results using both advanced visualization techniques and statistical algorithms. Besides univariate approaches for individual near-surface parameters, we used multivariate statistics to investigate multiple near-surface parameters of interest together. For the latter case, we defined generalized quality measures to quantify the model's accuracy. Furthermore, we elaborated a diagnosis tool applicable for atmospheric variables to assess the model's accuracy in representing the physical processes above the surface under various aspects. By means of this evaluation approach, it could be demonstrated in Case Study I that the accuracy of the applied regional climate model resides at the same level as that we found for another regional model and a global model. Excessive precipitation during the rainy season in coastal regions could be identified as a major contribution leading to this result. In Case Study II, we also identified the accuracy of the investigated mean characteristics for near- surface temperature and precipitation to be comparable to another regional model. In this case, an artificial modulation of the used initial and boundary data during preprocessing could be identified as the major source of error in the simulation. Altogether, the achieved results for the presented investigations indicate the potential of our methodology to be applied as a common test bed to different fields of research in regional climate modeling
Y1 - 2004
SN - 1561-8633
ER -
TY - BOOK
A1 - Eichhorn, Peter
A1 - Jann, Werner
A1 - Oechsler, Walter A.
A1 - Püttner, Günter
A1 - Reinermann, Heinrich
T1 - Verwaltungslexikon
Y1 - 2003
SN - 3-7890-6319-3
PB - Nomos-Verl.-Ges
CY - Baden-Baden
ER -
TY - JOUR
A1 - Simons, Nadja K.
A1 - Lewinsohn, Thomas
A1 - Bluethgen, Nico
A1 - Buscot, Francois
A1 - Boch, Steffen
A1 - Daniel, Rolf
A1 - Gossner, Martin M.
A1 - Jung, Kirsten
A1 - Kaiser, Kristin
A1 - Müller, Jörg
A1 - Prati, Daniel
A1 - Renner, Swen C.
A1 - Socher, Stephanie A.
A1 - Sonnemann, Ilja
A1 - Weiner, Christiane N.
A1 - Werner, Michael
A1 - Wubet, Tesfaye
A1 - Wurst, Susanne
A1 - Weisser, Wolfgang W.
T1 - Contrasting effects of grassland management modes on species-abundance distributions of multiple groups
JF - Agriculture, ecosystems & environment : an international journal for scientific research on the relationship of agriculture and food production to the biosphere
N2 - Intensive land use is a major cause of biodiversity loss, but most studies comparing the response of multiple taxa rely on simple diversity measures while analyses of other community attributes are only recently gaining attention. Species-abundance distributions (SADs) are a community attribute that can be used to study changes in the overall abundance structure of species groups, and whether these changes are driven by abundant or rare species. We evaluated the effect of grassland management intensity for three land-use modes (fertilization, mowing, grazing) and their combination on species richness and SADs for three belowground (arbuscular mycorrhizal fungi, prokaryotes and insect larvae) and seven aboveground groups (vascular plants, bryophytes and lichens; arthropod herbivores; arthropod pollinators; bats and birds). Three descriptors of SADs were evaluated: general shape (abundance decay rate), proportion of rare species (rarity) and proportional abundance of the commonest species (dominance). Across groups, taxonomic richness was largely unaffected by land-use intensity and only decreased with increasing mowing intensity. Of the three SAD descriptors, abundance decay rate became steeper with increasing combined land-use intensity across groups. This reflected a decrease in rarity among plants, herbivores and vertebrates. Effects of fertilization on the three descriptors were similar to the combined land-use intensity effects. Mowing intensity only affected the SAD descriptors of insect larvae and vertebrates, while grazing intensity produced a range of effects on different descriptors in distinct groups. Overall, belowground groups had more even abundance distribtitions than aboveground groups. Strong differences among aboveground groups and between above- and belowground groups indicate that no single taxonomic group can serve as an indicator for effects in other groups. In the past, the use of SADs has been hampered by concerns over theoretical models underlying specific forms of SADs. Our study shows that SAD descriptors that are not connected to a particular model are suitable to assess the effect of land use on community structure.
KW - Biodiversity
KW - Cutting frequency
KW - Management intensity
KW - Rank-abundance
KW - Species loss
KW - Rarity
Y1 - 2017
U6 - https://doi.org/10.1016/j.agee.2016.12.022
SN - 0167-8809
SN - 1873-2305
VL - 237
SP - 143
EP - 153
PB - Elsevier
CY - Amsterdam
ER -
TY - JOUR
A1 - Richardson, Noel D.
A1 - Russell, Christopher M. P.
A1 - St-Jean, Lucas
A1 - Moffat, Anthony F. J.
A1 - St-Louis, Nicole
A1 - Shenar, Tomer
A1 - Pablo, Herbert
A1 - Hill, Grant M.
A1 - Ramiaramanantsoa, Tahina
A1 - Corcoran, Michael
A1 - Hamuguchi, Kenji
A1 - Eversberg, Thomas
A1 - Miszalski, Brent
A1 - Chene, Andre-Nicolas
A1 - Waldron, Wayne
A1 - Kotze, Enrico J.
A1 - Kotze, Marissa M.
A1 - Luckas, Paul
A1 - Cacella, Paulo
A1 - Heathcote, Bernard
A1 - Powles, Jonathan
A1 - Bohlsen, Terry
A1 - Locke, Malcolm
A1 - Handler, Gerald
A1 - Kuschnig, Rainer
A1 - Pigulski, Andrzej
A1 - Popowicz, Adam
A1 - Wade, Gregg A.
A1 - Weiss, Werner W.
T1 - The variability of the BRITE-est Wolf-Rayet binary, gamma(2) Velorum-I. Photometric and spectroscopic evidence for colliding winds
JF - Monthly notices of the Royal Astronomical Society
N2 - We report on the first multi-colour precision light curve of the bright Wolf-Rayet binary gamma(2) Velorum, obtained over six months with the nanosatellites in the BRITE-Constellation fleet. In parallel, we obtained 488 high-resolution optical spectra of the system. In this first report on the data sets, we revise the spectroscopic orbit and report on the bulk properties of the colliding winds. We find a dependence of both the light curve and excess emission properties that scales with the inverse of the binary separation. When analysing the spectroscopic properties in combination with the photometry, we find that the phase dependence is caused only by excess emission in the lines, and not from a changing continuum. We also detect a narrow, high-velocity absorption component from the He perpendicular to lambda 5876 transition, which appears twice in the orbit. We calculate smoothed-particle hydrodynamical simulations of the colliding winds and can accurately associate the absorption from He perpendicular to to the leading and trailing arms of the wind shock cone passing tangentially through our line of sight. The simulations also explain the general strength and kinematics of the emission excess observed in wind lines such as C III lambda 5696 of the system. These results represent the first in a series of investigations into the winds and properties of gamma(2) Velorum through multi-technique and multi-wavelength observational campaigns.
KW - stars: early type
KW - stars: individual: gamma(2) Vel
KW - stars: mass loss
KW - stars: winds
KW - outflows
KW - stars: Wolf-Rayet
Y1 - 2017
U6 - https://doi.org/10.1093/mnras/stx1731
SN - 0035-8711
SN - 1365-2966
VL - 471
SP - 2715
EP - 2729
PB - Oxford Univ. Press
CY - Oxford
ER -
TY - JOUR
A1 - Weidinger, Johannes T.
A1 - Korup, Oliver
A1 - Munack, Henry
A1 - Altenberger, Uwe
A1 - Dunning, Stuart A.
A1 - Tippelt, Gerold
A1 - Lottermoser, Werner
T1 - Giant rockslides from the inside
JF - Earth & planetary science letters
N2 - The growing body of research on large-scale mass wasting events so far has only scarcely investigated the sedimentology of chaotic deposits from non-volcanic terrestrial landslides such that any overarching and systematic terminological framework remains elusive. Yet recent work has emphasized the need for better understanding the internal structure and composition of rockslide deposits as a means to characterise the mechanics during the final stages of runout and emplacement. We offer a comprehensive overview on the occurrence of rock fragmentation and frictional melt both at different geographic locations, and different sections within large (>10(6) m(3)) rockslide masses. We argue that exposures of pervasively fragmented and interlocked jigsaw-cracked rock masses; basal melange containing rip-up clasts and phantom blocks; micro-breccia; and thin bands of basal frictionite are indispensable clues for identifying deposits from giant rockslides that may remain morphologically inconspicuous otherwise. These sedimentary assemblages are diagnostic tools for distinguishing large rockslide debris from macro and microscopically similar glacial deposits, tectonic fault-zone breccias, and impact breccias, and thus help avoid palaeoclimatic and tectonic misinterpretations, let alone misestimates of the hazard from giant rockslides. Moreover, experimental results from Mossbauer spectroscopy of frictionite samples support visual interpretations of thin sections, and demonstrate that short-lived (<10 s) friction-induced partial melting at temperatures >1500 degrees C in the absence of water occurred at the base of several giant moving rockslides. This finding supports previous theories of dry excess runout accompanied by comminution of rock masses down to gm-scale, and indicates that catastrophic motion of large fragmenting rock masses does not require water as a potential lubricant.
KW - landslide
KW - petrography
KW - frictional melt
KW - pseudotachylyte
KW - breccia
KW - Mossbauer spectroscopy
Y1 - 2014
U6 - https://doi.org/10.1016/j.epsl.2013.12.017
SN - 0012-821X
SN - 1385-013X
VL - 389
SP - 62
EP - 73
PB - Elsevier
CY - Amsterdam
ER -