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Spatially resolving the very high energy emission from MRGO J2019+37 wih veritas

  • We present very high energy (VHE) imaging of MGRO J2019+37 obtained with the VERITAS observatory. The bright extended (similar to 2 degrees) unidentified Milagro source is located toward the rich star formation region Cygnus-X. MGRO J2019+37 is resolved into two VERITAS sources. The faint, point-like source VER J2016+371 overlaps CTB 87, a filled-center remnant (SNR) with no evidence of a supernova remnant shell at the present time. Its spectrum is well fit in the 0.65-10 TeV energy range by a power-law model with photon index 2.3 +/- 0.4. VER J2019+378 is a bright extended (similar to 1 degrees) source that likely accounts for the bulk of the Milagro emission and is notably coincident with PSR J2021+3651 and the star formation region Sh 2-104. Its spectrum in the range 1-30 TeV is well fit with a power-law model of photon index 1.75 +/- 0.3, among the hardest values measured in the VHE band, comparable to that observed near Vela-X. We explore the unusual spectrum and morphology in the radio and X-ray bands to constrain possibleWe present very high energy (VHE) imaging of MGRO J2019+37 obtained with the VERITAS observatory. The bright extended (similar to 2 degrees) unidentified Milagro source is located toward the rich star formation region Cygnus-X. MGRO J2019+37 is resolved into two VERITAS sources. The faint, point-like source VER J2016+371 overlaps CTB 87, a filled-center remnant (SNR) with no evidence of a supernova remnant shell at the present time. Its spectrum is well fit in the 0.65-10 TeV energy range by a power-law model with photon index 2.3 +/- 0.4. VER J2019+378 is a bright extended (similar to 1 degrees) source that likely accounts for the bulk of the Milagro emission and is notably coincident with PSR J2021+3651 and the star formation region Sh 2-104. Its spectrum in the range 1-30 TeV is well fit with a power-law model of photon index 1.75 +/- 0.3, among the hardest values measured in the VHE band, comparable to that observed near Vela-X. We explore the unusual spectrum and morphology in the radio and X-ray bands to constrain possible emission mechanisms for this source.zeige mehrzeige weniger

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Metadaten
Verfasserangaben:E. Aliu, T. Aune, B. Behera, M. Beilicke, W. Benbow, K. Berger, R. Bird, A. Bouvier, J. H. Buckley, V. Bugaev, M. Cerruti, Xuhui Chen, L. Ciupik, M. P. Connolly, W. Cui, J. Dumm, Vikram V. DwarkadasORCiD, M. Errando, A. Falcone, Simone FedericiGND, Q. Feng, J. P. Finley, H. Fleischhack, P. Fortin, L. Fortson, A. Furniss, N. Galante, G. H. Gillanders, E. V. Gotthelf, S. Griffin, S. T. Griffiths, J. Grube, G. Gyuk, D. Hanna, J. Holder, G. Hughes, T. B. Humensky, C. A. Johnson, P. Kaaret, O. Kargaltsev, M. Kertzman, Y. Khassen, D. Kieda, F. Krennrich, M. J. Lang, A. S. Madhavan, G. Maier, S. McArthur, A. McCann, J. Millis, P. Moriarty, R. Mukherjee, D. Nieto, R. A. Ong, A. N. Otte, D. Pandel, N. Park, Martin PohlORCiDGND, A. Popkow, H. Prokoph, J. Quinn, K. Ragan, J. Rajotte, L. C. Reyes, P. T. Reynolds, G. T. Richards, E. Roache, M. Roberts, G. H. Sembroski, K. Shahinyan, A. W. Smith, D. Staszak, Igor O. TelezhinskyORCiD, J. V. Tucci, J. Tyler, S. Vincent, S. P. Wakely, A. Weinstein, R. Welsing, Alina WilhelmORCiDGND, D. A. Williams, B. Zitzer
DOI:https://doi.org/10.1088/0004-637X/788/1/78
ISSN:0004-637X
ISSN:1538-4357
Titel des übergeordneten Werks (Englisch):The astrophysical journal : an international review of spectroscopy and astronomical physics
Verlag:IOP Publ. Ltd.
Verlagsort:Bristol
Publikationstyp:Wissenschaftlicher Artikel
Sprache:Englisch
Jahr der Erstveröffentlichung:2014
Erscheinungsjahr:2014
Datum der Freischaltung:27.03.2017
Freies Schlagwort / Tag:gamma rays : stars; pulsars : individual (PSR J2021+3651); supernovae : individual (CTB 87)
Band:788
Ausgabe:1
Seitenanzahl:10
Fördernde Institution:U.S. Department of Energy Office of Science; U.S. National Science Foundation; Smithsonian Institution; NSERC in Canada; Science Foundation Ireland [SFI 10/RFP/AST2748]; STFC in the U. K; ESA Member States and NASA; Natural Sciences and Engineering Research Council
Organisationseinheiten:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie
Peer Review:Referiert
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