Variable Very-High-Energy Gamma-Ray Emission from the Microquasar LS I +61 303
Author:
Albert J.12345, Aliu E.12345, Anderhub H.12345, Antoranz P.12345, Armada A.12345, Asensio M.12345, Baixeras C.12345, Barrio J. A.12345, Bartelt M.12345, Bartko H.12345, Bastieri D.12345, Bavikadi S. R.12345, Bednarek W.12345, Berger K.12345, Bigongiari C.12345, Biland A.12345, Bisesi E.12345, Bock R. K.12345, Bordas P.12345, Bosch-Ramon V.12345, Bretz T.12345, Britvitch I.12345, Camara M.12345, Carmona E.12345, Chilingarian A.12345, Ciprini S.12345, Coarasa J. A.12345, Commichau S.12345, Contreras J. L.12345, Cortina J.12345, Curtef V.12345, Danielyan V.12345, Dazzi F.12345, De Angelis A.12345, de los Reyes R.12345, De Lotto B.12345, Domingo-SantamariÌa E.12345, Dorner D.12345, Doro M.12345, Errando M.12345, Fagiolini M.12345, Ferenc D.12345, FernaÌndez E.12345, Firpo R.12345, Flix J.12345, Fonseca M. V.12345, Font L.12345, Fuchs M.12345, Galante N.12345, Garczarczyk M.12345, Gaug M.12345, Giller M.12345, Goebel F.12345, Hakobyan D.12345, Hayashida M.12345, Hengstebeck T.12345, HoÌhne D.12345, Hose J.12345, Hsu C. C.12345, Isar P. G.12345, Jacon P.12345, Kalekin O.12345, Kosyra R.12345, Kranich D.12345, Laatiaoui M.12345, Laille A.12345, Lenisa T.12345, Liebing P.12345, Lindfors E.12345, Lombardi S.12345, Longo F.12345, LoÌpez J.12345, LoÌpez M.12345, Lorenz E.12345, Lucarelli F.12345, Majumdar P.12345, Maneva G.12345, Mannheim K.12345, Mansutti O.12345, Mariotti M.12345, MartiÌnez M.12345, Mase K.12345, Mazin D.12345, Merck C.12345, Meucci M.12345, Meyer M.12345, Miranda J. M.12345, Mirzoyan R.12345, Mizobuchi S.12345, Moralejo A.12345, Nilsson K.12345, OnÌa-Wilhelmi E.12345, OrdunÌa R.12345, Otte N.12345, Oya I.12345, Paneque D.12345, Paoletti R.12345, Paredes J. M.12345, Pasanen M.12345, Pascoli D.12345, Pauss F.12345, Pavel N.12345, Pegna R.12345, Persic M.12345, Peruzzo L.12345, Piccioli A.12345, Poller M.12345, Pooley G.12345, Prandini E.12345, Raymers A.12345, Rhode W.12345, RiboÌ M.12345, Rico J.12345, Riegel B.12345, Rissi M.12345, Robert A.12345, Romero G. E.12345, RuÌgamer S.12345, Saggion A.12345, SaÌnchez A.12345, Sartori P.12345, Scalzotto V.12345, Scapin V.12345, Schmitt R.12345, Schweizer T.12345, Shayduk M.12345, Shinozaki K.12345, Shore S. N.12345, Sidro N.12345, SillanpaÌaÌ A.12345, Sobczynska D.12345, Stamerra A.12345, Stark L. S.12345, Takalo L.12345, Temnikov P.12345, Tescaro D.12345, Teshima M.12345, Tonello N.12345, Torres A.12345, Torres D. F.12345, Turini N.12345, Vankov H.12345, Vitale V.12345, Wagner R. M.12345, Wibig T.12345, Wittek W.12345, Zanin R.12345, Zapatero J.12345
Affiliation:
1. UniversitaÌt WuÌrzburg, D-97074 WuÌrzburg, Germany. 2. Institut de FiÌsica d'Altes Energies, E-08193 Bellaterra (Barcelona), Spain. 3. EidgenoÌssische Technische Hochschule ZuÌrich, CH-8093 ZuÌrich, Switzerland. 4. Universidad Complutense, E-28040 Madrid, Spain. 5. Universitat AutoÌnoma de Barcelona, E-08193 Bellaterra, Spain.
Abstract
Microquasars are binary star systems with relativistic radio-emitting jets. They are potential sources of cosmic rays and can be used to elucidate the physics of relativistic jets. We report the detection of variable gamma-ray emission above 100 gigaelectron volts from the microquasar LS I 61 + 303. Six orbital cycles were recorded. Several detections occur at a similar orbital phase, which suggests that the emission is periodic. The strongest gamma-ray emission is not observed when the two stars are closest to one another, implying a strong orbital modulation of the emission or absorption processes.
Publisher
American Association for the Advancement of Science (AAAS)
Subject
Multidisciplinary
Cited by
331 articles.
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