TY  - JOUR
A1  - De Angelis, A.
A1  - Tatischeff, V.
A1  - Grenier, I. A.
A1  - McEnery, J.
A1  - Mallamaci, Manuela
A1  - Tavani, M.
A1  - Oberlack, U.
A1  - Hanlon, L.
A1  - Walter, R.
A1  - Argan, A.
A1  - Von Ballmoos, P.
A1  - Bulgarelli, A.
A1  - Bykov, A.
A1  - Hernanz, M.
A1  - Kanbach, G.
A1  - Kuvvetli, I.
A1  - Pearce, M.
A1  - Zdziarski, A.
A1  - Conrad, J.
A1  - Ghisellini, G.
A1  - Harding, A.
A1  - Isern, J.
A1  - Leising, M.
A1  - Longo, F.
A1  - Madejski, G.
A1  - Martinez, M.
A1  - Mazziotta, Mario Nicola
A1  - Paredes, J. M.
A1  - Pohl, Martin
A1  - Rando, R.
A1  - Razzano, M.
A1  - Aboudan, A.
A1  - Ackermann, M.
A1  - Addazi, A.
A1  - Ajello, M.
A1  - Albertus, C.
A1  - Alvarez, J. M.
A1  - Ambrosi, G.
A1  - Anton, S.
A1  - Antonelli, L. A.
A1  - Babic, A.
A1  - Baibussinov, B.
A1  - Balbom, M.
A1  - Baldini, L.
A1  - Balman, S.
A1  - Bambi, C.
A1  - Barres de Almeida, U.
A1  - Barrio, J. A.
A1  - Bartels, R.
A1  - Bastieri, D.
A1  - Bednarek, W.
A1  - Bernard, D.
A1  - Bernardini, E.
A1  - Bernasconi, T.
A1  - Bertucci, B.
A1  - Biland, A.
A1  - Bissaldi, E.
A1  - Boettcher, M.
A1  - Bonvicini, V.
A1  - Bosch-Ramon, V.
A1  - Bottacini, E.
A1  - Bozhilov, V.
A1  - Bretz, T.
A1  - Branchesi, M.
A1  - Brdar, V.
A1  - Bringmann, T.
A1  - Brogna, A.
A1  - Jorgensen, C. Budtz
A1  - Busetto, G.
A1  - Buson, S.
A1  - Busso, M.
A1  - Caccianiga, A.
A1  - Camera, S.
A1  - Campana, R.
A1  - Caraveo, P.
A1  - Cardillo, M.
A1  - Carlson, P.
A1  - Celestin, S.
A1  - Cermeno, M.
A1  - Chen, A.
A1  - Cheung, C. C.
A1  - Churazov, E.
A1  - Ciprini, S.
A1  - Coc, A.
A1  - Colafrancesco, S.
A1  - Coleiro, A.
A1  - Collmar, W.
A1  - Coppi, P.
A1  - Curado da Silva, R.
A1  - Cutini, S.
A1  - De Lotto, B.
A1  - de Martino, D.
A1  - De Rosa, A.
A1  - Del Santo, M.
A1  - Delgado, L.
A1  - Diehl, R.
A1  - Dietrich, S.
A1  - Dolgov, A. D.
A1  - Dominguez, A.
A1  - Prester, D. Dominis
A1  - Donnarumma, I.
A1  - Dorner, D.
A1  - Doro, M.
A1  - Dutra, M.
A1  - Elsaesser, D.
A1  - Fabrizio, M.
A1  - Fernandez-Barral, A.
A1  - Fioretti, V.
A1  - Foffano, L.
A1  - Formato, V.
A1  - Fornengo, N.
A1  - Foschini, L.
A1  - Franceschini, A.
A1  - Franckowiak, A.
A1  - Funk, S.
A1  - Fuschino, F.
A1  - Gaggero, D.
A1  - Galanti, G.
A1  - Gargano, F.
A1  - Gasparrini, D.
A1  - Gehrz, R.
A1  - Giammaria, P.
A1  - Giglietto, N.
A1  - Giommi, P.
A1  - Giordano, F.
A1  - Giroletti, M.
A1  - Ghirlanda, G.
A1  - Godinovic, N.
A1  - Gouiffes, C.
A1  - Grove, J. E.
A1  - Hamadache, C.
A1  - Hartmann, D. H.
A1  - Hayashida, M.
A1  - Hryczuk, A.
A1  - Jean, P.
A1  - Johnson, T.
A1  - Jose, J.
A1  - Kaufmann, S.
A1  - Khelifi, B.
A1  - Kiener, J.
A1  - Knodlseder, J.
A1  - Kolem, M.
A1  - Kopp, J.
A1  - Kozhuharov, V.
A1  - Labanti, C.
A1  - Lalkovski, S.
A1  - Laurent, P.
A1  - Limousin, O.
A1  - Linares, M.
A1  - Lindfors, E.
A1  - Lindner, M.
A1  - Liu, J.
A1  - Lombardi, S.
A1  - Loparco, F.
A1  - Lopez-Coto, R.
A1  - Lopez Moya, M.
A1  - Lott, B.
A1  - Lubrano, P.
A1  - Malyshev, D.
A1  - Mankuzhiyil, N.
A1  - Mannheim, K.
A1  - Marcha, M. J.
A1  - Marciano, A.
A1  - Marcote, B.
A1  - Mariotti, M.
A1  - Marisaldi, M.
A1  - McBreen, S.
A1  - Mereghetti, S.
A1  - Merle, A.
A1  - Mignani, R.
A1  - Minervini, G.
A1  - Moiseev, A.
A1  - Morselli, A.
A1  - Moura, F.
A1  - Nakazawa, K.
A1  - Nava, L.
A1  - Nieto, D.
A1  - Orienti, M.
A1  - Orio, M.
A1  - Orlando, E.
A1  - Orleanski, P.
A1  - Paiano, S.
A1  - Paoletti, R.
A1  - Papitto, A.
A1  - Pasquato, M.
A1  - Patricelli, B.
A1  - Perez-Garcia, M. A.
A1  - Persic, M.
A1  - Piano, G.
A1  - Pichel, A.
A1  - Pimenta, M.
A1  - Pittori, C.
A1  - Porter, T.
A1  - Poutanen, J.
A1  - Prandini, E.
A1  - Prantzos, N.
A1  - Produit, N.
A1  - Profumo, S.
A1  - Queiroz, F. S.
A1  - Raino, S.
A1  - Raklev, A.
A1  - Regis, M.
A1  - Reichardt, I.
A1  - Rephaeli, Y.
A1  - Rico, J.
A1  - Rodejohann, W.
A1  - Fernandez, G. Rodriguez
A1  - Roncadelli, M.
A1  - Roso, L.
A1  - Rovero, A.
A1  - Ruffini, R.
A1  - Sala, G.
A1  - Sanchez-Conde, M. A.
A1  - Santangelo, A.
A1  - Parkinson, P. Saz
A1  - Sbarrato, T.
A1  - Shearer, A.
A1  - Shellard, R.
A1  - Short, K.
A1  - Siegert, T.
A1  - Siqueira, C.
A1  - Spinelli, P.
A1  - Stamerra, A.
A1  - Starrfield, S.
A1  - Strong, A.
A1  - Strumke, I.
A1  - Tavecchio, F.
A1  - Taverna, R.
A1  - Terzic, T.
A1  - Thompson, D. J.
A1  - Tibolla, O.
A1  - Torres, D. F.
A1  - Turolla, R.
A1  - Ulyanov, A.
A1  - Ursi, A.
A1  - Vacchi, A.
A1  - Van den Abeele, J.
A1  - Vankova-Kirilovai, G.
A1  - Venter, C.
A1  - Verrecchia, F.
A1  - Vincent, P.
A1  - Wang, X.
A1  - Weniger, C.
A1  - Wu, X.
A1  - Zaharijas, G.
A1  - Zampieri, L.
A1  - Zane, S.
A1  - Zimmer, S.
A1  - Zoglauer, A.
T1  - Science with e-ASTROGAM A space mission for MeV-GeV gamma-ray astrophysics
JF  - Journal of High Energy Astrophysics
Y1  - 2018
U6  - https://doi.org/10.1016/j.jheap.2018.07.001
SN  - 2214-4048
SN  - 2214-4056
VL  - 19
SP  - 1
EP  - 106
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Dzhanoev, Arsen R.
A1  - Schmidt, J.
A1  - Liu, X.
A1  - Spahn, Frank
T1  - Charging of small grains in a space plasma: Application to Jovian stream particles
JF  - International psychogeriatrics
N2  - Context. Most theoretical investigations of dust charging processes in space have treated the current balance condition as independent of grain size. However, for small grains, since they are often observed in space environments, a dependence on grain size is expected owing to secondary electron emission (SEE). Here, by the term "small" we mean a particle size comparable to the typical penetration depth for given primary electron energy. The results are relevant for the dynamics of small, charged dust particles emitted by the volcanic moon Io, which forms the Jovian dust streams. Aims. We revise the theory of charging of small (submicron sized) micrometeoroids to take into account a high production of secondary electrons for small grains immersed in an isotropic flux of electrons. We apply our model to obtain an improved estimate for the charge of the dust streams leaving the Jovian system, detected by several spacecraft. Methods. We apply a continuum model to describe the penetration of primary electrons in a grain and the emission of secondary electrons along the path. Averaging over an isotropic flux of primaries, we derive a new expression for the secondary electron yield, which can be used to express the secondary electron current on a grain. Results. For the Jupiter plasma environment we derive the surface potential of grains composed of NaCl (believed to be the major constituent of Jovian dust stream particles) or silicates. For small particles, the potential depends on grain size and the secondary electron current induces a sensitivity to material properties. As a result of the small particle effect, the estimates for the charging times and for the fractional charge fluctuations of NaCl grains obtained using our general approach to SEE give results qualitatively different from the analogous estimates derived from the traditional approach to SEE. We find that for the charging environment considered in this paper field emission does not limit the charging of NaCl grains.
KW  - plasmas
KW  - planets and satellites: individual: Jupiter
Y1  - 2016
U6  - https://doi.org/10.1051/0004-6361/201527891
SN  - 1432-0746
VL  - 591
SP  - 647
EP  - 684
PB  - EDP Sciences
CY  - Les Ulis
ER  - 
TY  - INPR
A1  - Dines, Nicoleta
A1  - Liu, X.
A1  - Schulze, Bert-Wolfgang
T1  - Edge quantisation of elliptic operators
N2  - The ellipticity of operators on a manifold with edge is defined as the bijectivity of the components of a principal symbolic hierarchy σ = (σψ, σ∧), where the second component takes value in operators on the infinite model cone of the local wedges. In general understanding of edge problems there are two basic aspects: Quantisation of edge-degenerate operators in weighted Sobolev spaces, and verifying the elliptcity of the principal edge symbol σ∧ which includes the (in general not explicitly known) number of additional conditions on the edge of trace and potential type. We focus here on these queations and give explicit answers for a wide class of elliptic operators that are connected with the ellipticity of edge boundary value problems and reductions to the boundary. In particular, we study the edge quantisation and ellipticity for Dirichlet-Neumann operators with respect to interfaces of some codimension on a boundary. We show analogues of the Agranovich-Dynin formula for edge boundary value problems, and we establish relations of elliptic operators for different weights, via the spectral flow of the underlying conormal symbols.
T3  - Preprint - (2004) 24 
KW  - Boundary value problems
KW  - edge singularities
KW  - ellipticity
KW  - spectral flow
Y1  - 2004
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-26838
ER  - 
TY  - JOUR
A1  - Ahnen, M. L.
A1  - Ansoldi, S.
A1  - Antonelli, L. A.
A1  - Arcaro, C.
A1  - Babie, A.
A1  - Banerjee, B.
A1  - Bangale, P.
A1  - de Almeida, U. Barres
A1  - Barrio, J. A.
A1  - Gonzalez, J. Becerra
A1  - Bednarek, W.
A1  - Bernardini, E.
A1  - Berti, A.
A1  - Biasuzzi, B.
A1  - Biland, A.
A1  - Blanch, O.
A1  - Bonnefoy, S.
A1  - Bonnoli, G.
A1  - Borracci, F.
A1  - Carosi, R.
A1  - Carosi, A.
A1  - Chatterjee, A.
A1  - Colin, P.
A1  - Colombo, E.
A1  - Contreras, J. L.
A1  - Cortina, J.
A1  - Covino, S.
A1  - Cumani, P.
A1  - Da Vela, P.
A1  - Dazzi, F.
A1  - De Angelis, A.
A1  - De Lotto, B.
A1  - Wilhelmi, E. de Ona
A1  - Di Pierro, F.
A1  - Doert, M.
A1  - Dominguez, A.
A1  - Prester, D. Dominis
A1  - Dorner, D.
A1  - Doro, M.
A1  - Einecke, S.
A1  - Glawion, D. Eisenacher
A1  - Elsaesser, D.
A1  - Engelkemeier, M.
A1  - Ramazani, V. Fallah
A1  - Fernandez-Barra, A.
A1  - Fidalgo, D.
A1  - Fonseca, M. V.
A1  - Font, L.
A1  - Fruck, C.
A1  - Galindo, D.
A1  - Lopez, R. J. Garcia
A1  - Garczarczyk, M.
A1  - Gaug, M.
A1  - Giammaria, P.
A1  - Godinovie, N.
A1  - Gora, D.
A1  - Griffiths, S.
A1  - Guberman, D.
A1  - Hadasch, D.
A1  - Hahn, A.
A1  - Hassan, T.
A1  - Hayashida, M.
A1  - Herrera, J.
A1  - Hose, J.
A1  - Hrupec, D.
A1  - Hughes, G.
A1  - Ishio, K.
A1  - Konno, Y.
A1  - Kubo, H.
A1  - Kushida, J.
A1  - Kuvezdie, D.
A1  - Lelas, D.
A1  - Lindfors, E.
A1  - Lombardi, S.
A1  - Longo, F.
A1  - Lopez, M.
A1  - Lopez-Oramas, A.
A1  - Majumdar, P.
A1  - Makariev, M.
A1  - Maneva, G.
A1  - Manganaro, M.
A1  - Mannheim, K.
A1  - Maraschi, L.
A1  - Mariotti, M.
A1  - Martinez, M.
A1  - Mazin, D.
A1  - Menzel, U.
A1  - Minev, M.
A1  - Mirzoyan, R.
A1  - Moralejo, A.
A1  - Moreno, V.
A1  - Moretti, E.
A1  - Munar-Adrover, P.
A1  - Neustroev, V.
A1  - Niedzwiecki, A.
A1  - Rosillo, M. Nievas
A1  - Nilsson, K.
A1  - Nishijima, K.
A1  - Noda, K.
A1  - Nogues, L.
A1  - Paiano, S.
A1  - Palacio, J.
A1  - Paneque, D.
A1  - Paoletti, R.
A1  - Paredes, J. M.
A1  - Paredes-Fortuny, X.
A1  - Pedaletti, G.
A1  - Peresano, M.
A1  - Perri, L.
A1  - Persic, M.
A1  - Moroni, P. G. Prada
A1  - Prandini, E.
A1  - Puljak, I.
A1  - Garcia, J. R.
A1  - Reichardt, I.
A1  - Rhode, W.
A1  - Riti, M.
A1  - Rico, J.
A1  - Saito, T.
A1  - Satalecka, K.
A1  - Schroeder, S.
A1  - Schweizer, T.
A1  - Shore, S. N.
A1  - Sillanpaa, A.
A1  - Sitarek, J.
A1  - Sobczynskall, D.
A1  - Stamerra, A.
A1  - Strzys, M.
A1  - Surie, T.
A1  - Takalo, L.
A1  - Tavecchio, F.
A1  - Temnikov, P.
A1  - Terzie, T.
A1  - Tescaro, D.
A1  - Teshima, M.
A1  - Torres, D. F.
A1  - Torres-Alla, N.
A1  - Treves, A.
A1  - Vanzo, G.
A1  - Acosta, M. Vazquez
A1  - Vovk, I.
A1  - Ward, J. E.
A1  - Will, M.
A1  - Wu, M. H.
A1  - Zarie, D.
A1  - Abdalla, Hassan E.
A1  - Abramowski, A.
A1  - Aharonian, Felix A.
A1  - Benkhali, F. Ait
A1  - Akhperjanian, A. G.
A1  - Andersson, T.
A1  - Angüner, Ekrem Oǧuzhan
A1  - Arakawa, M.
A1  - Arrieta, M.
A1  - Aubert, P.
A1  - Backes, M.
A1  - Balzer, A.
A1  - Barnard, M.
A1  - Becherini, Y.
A1  - Tjus, J. Becker
A1  - Berge, D.
A1  - Bernhard, S.
A1  - Bernlohr, K.
A1  - Blackwell, R.
A1  - Bottcher, M.
A1  - Boisson, C.
A1  - Bolmont, J.
A1  - Bordas, Pol
A1  - Bregeon, J.
A1  - Brun, F.
A1  - Brun, P.
A1  - Bryan, M.
A1  - Btichele, M.
A1  - Bulik, T.
A1  - Capasso, M.
A1  - Carr, J.
A1  - Casanova, Sabrina
A1  - Cerruti, M.
A1  - Chakraborty, N.
A1  - Chalme-Calvet, R.
A1  - Chaves, R. C. G.
A1  - Chen, A.
A1  - Chevalier, J.
A1  - Chretien, M.
A1  - Coffaro, M.
A1  - Colafrancesco, S.
A1  - Cologna, G.
A1  - Condon, B.
A1  - Conrad, J.
A1  - Cui, Y.
A1  - Davids, I. D.
A1  - Decock, J.
A1  - Degrange, B.
A1  - Dei, C.
A1  - Devin, J.
A1  - Dewilt, P.
A1  - Dirson, L.
A1  - Djannati-Atai, A.
A1  - Domainko, W.
A1  - Donath, A.
A1  - Dutson, K.
A1  - Dyks, J.
A1  - Edwards, T.
A1  - Egberts, Kathrin
A1  - Eger, P.
A1  - Ernenwein, J. -P.
A1  - Eschbach, S.
A1  - Farnier, C.
A1  - Fegan, S.
A1  - Fernandes, M. V.
A1  - Fiasson, A.
A1  - Fontaine, G.
A1  - Forster, A.
A1  - Funk, S.
A1  - Ftifiling, M.
A1  - Gabici, S.
A1  - Gajdus, M.
A1  - Gallant, Y. A.
A1  - Garrigoux, T.
A1  - Giavitto, G.
A1  - Giebels, B.
A1  - Glicenstein, J. F.
A1  - Gottschal, D.
A1  - Goya, A.
A1  - Grondin, M. -H.
A1  - Hahn, J.
A1  - Haupt, M.
A1  - Hawkes, J.
A1  - Heinzelmann, G.
A1  - Henri, G.
A1  - Hermann, G.
A1  - Hervet, O.
A1  - Hinton, J. A.
A1  - Hofmann, W.
A1  - Hoischen, Clemens
A1  - Holler, M.
A1  - Horns, D.
A1  - Ivascenko, A.
A1  - Iwasaki, H.
A1  - Jacholkowska, A.
A1  - Jamrozy, M.
A1  - Janiak, M.
A1  - Jankowsky, D.
A1  - Jankowsky, F.
A1  - Jingo, M.
A1  - Jogler, T.
A1  - Jouvin, L.
A1  - Jung-Richardt, I.
A1  - Kastendieck, M. A.
A1  - Katarzyfiski, K.
A1  - Katsuragawa, M.
A1  - Katz, U.
A1  - Kerszberg, D.
A1  - Khangulyan, D.
A1  - Khelifi, B.
A1  - Kieffer, M.
A1  - King, J.
A1  - Klepser, S.
A1  - Klochkov, D.
A1  - Kluiniak, W.
A1  - Kolitzus, D.
A1  - Komin, Nu.
A1  - Kosack, K.
A1  - Krakau, S.
A1  - Kraus, M.
A1  - Krtiger, P. P.
A1  - Laffon, H.
A1  - Lamanna, G.
A1  - Lau, J.
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, T.
A1  - Lorentz, M.
A1  - Liu, R.
A1  - Lopez-Coto, R.
A1  - Lypova, I.
A1  - Marandon, V.
A1  - Marcowith, Alexandre
A1  - Mariaud, C.
A1  - Marx, R.
A1  - Maurin, G.
A1  - Maxted, N.
A1  - Mayer, M.
A1  - Meintjes, P. J.
A1  - Meyer, M.
A1  - Mitche, A. M. W.
A1  - Moderski, R.
A1  - Mohamed, M.
A1  - Mohrmann, L.
A1  - Mora, K.
A1  - Moulin, Emmanuel
A1  - Murach, T.
A1  - Nakashima, S.
A1  - De Naurois, M.
A1  - Niederwanger, F.
A1  - Niemiec, J.
A1  - Oakes, L.
A1  - Odaka, H.
A1  - Ott, S.
A1  - Ohm, S.
A1  - Ostrowski, M.
A1  - Oya, I.
A1  - Padovani, M.
A1  - Panter, M.
A1  - Parsons, R. D.
A1  - Pekeur, N. W.
A1  - Pelletier, G.
A1  - Perennes, C.
A1  - Petrucci, P. -O.
A1  - Peyaud, B.
A1  - Pie, Q.
A1  - Pita, S.
A1  - Poon, H.
A1  - Prokhorov, D.
A1  - Prokoph, H.
A1  - Ptffilhofer, G.
A1  - Punch, M.
A1  - Quirrenbach, A.
A1  - Raab, S.
A1  - Reimer, A.
A1  - Reimer, O.
A1  - Renaud, M.
A1  - De Los Reyes, R.
A1  - Richter, S.
A1  - Rieger, F.
A1  - Romoli, C.
A1  - Rowell, G.
A1  - Rudak, B.
A1  - Rulten, C. B.
A1  - Safi-Harb, S.
A1  - Sahakian, V.
A1  - Saito, S.
A1  - Salek, D.
A1  - Sanchez, D. A.
A1  - Santangelo, A.
A1  - Sasaki, M.
A1  - Schlickeiser, R.
A1  - Schtissler, F.
A1  - Schulz, A.
A1  - Schwanke, U.
A1  - Schwemmer, S.
A1  - Seglar-Arroyo, M.
A1  - Settimo, M.
A1  - Seyffert, A. S.
A1  - Shafi, N.
A1  - Shilon, I.
A1  - Simoni, R.
A1  - So, H.
A1  - Spanier, F.
A1  - Spengler, G.
A1  - Spies, F.
A1  - Stawarz, L.
A1  - Steenkamp, R.
A1  - Stegmann, Christian
A1  - Stycz, K.
A1  - Sushch, I.
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  - 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  - Vok, H. J.
A1  - Vuillaume, T.
A1  - Wadiasingh, Z.
A1  - Wagner, S. J.
A1  - Wagner, P.
A1  - Wagner, R. M.
A1  - White, R.
A1  - Wierzcholska, A.
A1  - Willmann, P.
A1  - Wornlein, A.
A1  - Wouters, D.
A1  - Yang, R.
A1  - Zabalza, V.
A1  - Zaborov, D.
A1  - Zacharias, M.
A1  - Zanin, R.
A1  - Zdziarski, A. A.
A1  - Zech, Alraune
A1  - Zefi, F.
A1  - Ziegler, A.
A1  - Zywuckan, N.
T1  - Constraints on particle acceleration in SS433/W50 from MAGIC and HESS observations
JF  - Astronomy and astrophysics : an international weekly journal
N2  - Context. The large jet kinetic power and non-thermal processes occurring in the microquasar SS 433 make this source a good candidate for a very high-energy (VHE) gamma-ray emitter. Gamma-ray fluxes above the sensitivity limits of current Cherenkov telescopes have been predicted for both the central X-ray binary system and the interaction regions of SS 433 jets with the surrounding W50 nebula. Non-thermal emission at lower energies has been previously reported, indicating that efficient particle acceleration is taking place in the system. Aims. We explore the capability of SS 433 to emit VHE gamma rays during periods in which the expected flux attenuation due to periodic eclipses (P-orb similar to 13.1 days) and precession of the circumstellar disk (P-pre similar to 162 days) periodically covering the central binary system is expected to be at its minimum. The eastern and western SS 433/W50 interaction regions are also examined using the whole data set available. We aim to constrain some theoretical models previously developed for this system with our observations. Methods. We made use of dedicated observations from the Major Atmospheric Gamma Imaging Cherenkov telescopes (MAGIC) and High Energy Spectroscopic System (H.E.S.S.) of SS 433 taken from 2006 to 2011. These observation were combined for the first time and accounted for a total effective observation time of 16.5 h, which were scheduled considering the expected phases of minimum absorption of the putative VHE emission. Gamma-ray attenuation does not affect the jet/medium interaction regions. In this case, the analysis of a larger data set amounting to similar to 40-80 h, depending on the region, was employed. Results. No evidence of VHE gamma-ray emission either from the central binary system or from the eastern/western interaction regions was found. Upper limits were computed for the combined data set. Differential fluxes from the central system are found to be less than or similar to 10(-12)-10(-13) TeV-1 cm(-2) s(-1) in an energy interval ranging from similar to few x 100 GeV to similar to few TeV. Integral flux limits down to similar to 10(-12)-10(-13) ph cm(-2) s(-1) and similar to 10(-13)-10(-14) ph cm(-2) s(-1) are obtained at 300 and 800 GeV, respectively. Our results are used to place constraints on the particle acceleration fraction at the inner jet regions and on the physics of the jet/medium interactions. Conclusions. Our findings suggest that the fraction of the jet kinetic power that is transferred to relativistic protons must be relatively small in SS 433, q(p) <= 2.5 x 10(-5), to explain the lack of TeV and neutrino emission from the central system. At the SS 433/W50 interface, the presence of magnetic fields greater than or similar to 10 mu G is derived assuming a synchrotron origin for the observed X-ray emission. This also implies the presence of high-energy electrons with E-e up to 50 TeV, preventing an efficient production of gamma-ray fluxes in these interaction regions.
KW  - gamma rays: general
KW  - stars: black holes
KW  - X-rays: binaries
KW  - ISM: jets and outflows
Y1  - 2018
U6  - https://doi.org/10.1051/0004-6361/201731169
SN  - 1432-0746
VL  - 612
PB  - EDP Sciences
CY  - Les Ulis
ER  - 
TY  - JOUR
A1  - Aichner, Bernhard
A1  - Feakins, Sarah J.
A1  - Lee, J. E.
A1  - Herzschuh, Ulrike
A1  - Liu, X.
T1  - High-resolution leaf wax carbon and hydrogen isotopic record of the late Holocene paleoclimate in arid Central Asia
JF  - Climate of the past : an interactive open access journal of the European Geosciences Union
N2  - Central Asia is located at the confluence of large-scale atmospheric circulation systems. It is thus likely to be highly susceptible to changes in the dynamics of those systems; however, little is still known about the regional paleoclimate history. Here we present carbon and hydrogen isotopic compositions of n-alkanoic acids from a late Holocene sediment core from Lake Karakuli (eastern Pamir, Xinjiang Province, China). Instrumental evidence and isotopeenabled climate model experiments with the Laboratoire de Meteorologie Dynamique Zoom model version 4 (LMDZ4) demonstrate that delta D values of precipitation in the region are influenced by both temperature and precipitation amount. We find that these parameters are inversely correlated on an annual scale, i.e., the climate has varied between relatively cool and wet and more warm and dry over the last 50 years. Since the isotopic signals of these changes are in the same direction and therefore additive, isotopes in precipitation are sensitive recorders of climatic changes in the region. Additionally, we infer that plants use year-round precipitation (including snowmelt), and thus leaf wax delta D values must also respond to shifts in the proportion of moisture derived from westerly storms during late winter and early spring. Downcore results give evidence for a gradual shift to cooler and wetter climates between 3.5 and 2.5 cal kyr BP, interrupted by a warm and dry episode between 3.0 and 2.7 kyr BP. Further cool and wet episodes occur between 1.9 and 1.5 and between 0.6 and 0.1 kyr BP, the latter coeval with the Little Ice Age. Warm and dry episodes from 2.5 to 1.9 and 1.5 to 0.6 kyr BP coincide with the Roman Warm Period and Medieval Climate Anomaly, respectively. Finally, we find a drying tend in recent decades. Regional comparisons lead us to infer that the strength and position of the westerlies, and wider northern hemispheric climate dynamics, control climatic shifts in arid Central Asia, leading to complex local responses. Our new archive from Lake Karakuli provides a detailed record of the local signatures of these climate transitions in the eastern Pamir.
Y1  - 2015
U6  - https://doi.org/10.5194/cp-11-619-2015
SN  - 1814-9324
SN  - 1814-9332
VL  - 11
IS  - 4
SP  - 619
EP  - 633
PB  - Copernicus
CY  - Göttingen
ER  - 
TY  - GEN
A1  - Aichner, Bernhard
A1  - Feakins, Sarah  J.
A1  - Lee, J. E.
A1  - Herzschuh, Ulrike
A1  - Liu, X.
T1  - High-resolution leaf wax carbon and hydrogen isotopic record of the late Holocene paleoclimate in arid Central Asia
T2  - Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
N2  - Central Asia is located at the confluence of large-scale atmospheric circulation systems. It is thus likely to be highly susceptible to changes in the dynamics of those systems; however, little is still known about the regional paleoclimate history. Here we present carbon and hydrogen isotopic compositions of n-alkanoic acids from a late Holocene sediment core from Lake Karakuli (eastern Pamir, Xinjiang Province, China). Instrumental evidence and isotopeenabled climate model experiments with the Laboratoire de Meteorologie Dynamique Zoom model version 4 (LMDZ4) demonstrate that delta D values of precipitation in the region are influenced by both temperature and precipitation amount. We find that these parameters are inversely correlated on an annual scale, i.e., the climate has varied between relatively cool and wet and more warm and dry over the last 50 years. Since the isotopic signals of these changes are in the same direction and therefore additive, isotopes in precipitation are sensitive recorders of climatic changes in the region. Additionally, we infer that plants use year-round precipitation (including snowmelt), and thus leaf wax delta D values must also respond to shifts in the proportion of moisture derived from westerly storms during late winter and early spring. Downcore results give evidence for a gradual shift to cooler and wetter climates between 3.5 and 2.5 cal kyr BP, interrupted by a warm and dry episode between 3.0 and 2.7 kyr BP. Further cool and wet episodes occur between 1.9 and 1.5 and between 0.6 and 0.1 kyr BP, the latter coeval with the Little Ice Age. Warm and dry episodes from 2.5 to 1.9 and 1.5 to 0.6 kyr BP coincide with the Roman Warm Period and Medieval Climate Anomaly, respectively. Finally, we find a drying tend in recent decades. Regional comparisons lead us to infer that the strength and position of the westerlies, and wider northern hemispheric climate dynamics, control climatic shifts in arid Central Asia, leading to complex local responses. Our new archive from Lake Karakuli provides a detailed record of the local signatures of these climate transitions in the eastern Pamir.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 506 
KW  - North-Atlantic climate
KW  - Aral Sea basin
KW  - delta-D values
KW  - last 15 kyr
KW  - athmospheric circulation
KW  - ice core
KW  - moisture evolution
KW  - lipid biomarkers
KW  - Tibetan Plateau
KW  - Eastern pamirs
Y1  - 2019
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-408442
SN  - 1866-8372
IS  - 506
ER  -