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EnglishMicroquasars 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 LSI+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.
| Titolo: | Variable very-high-energy gamma-ray emission from the microquasar LS I +61 303 |
| Autori: | |
| Data di pubblicazione: | 2006 |
| Rivista: | |
| Citazione: | Variable very-high-energy gamma-ray emission from the microquasar LS I +61 303 / Albert J ; Aliu E ; Anderhub H ; Antoranz P ; Armada A ; Asensio M ; Baixeras C ; Barrio JA ; Bartelt M ; Bartko H ; Bastieri D ; Bavikadi SR ; Bednarek W ; Berger K ; Bigongiari C ; Biland A ; Bisesi E ; Bock RK ; Bordas P ; Bosch-Ramon V ; Bretz T ; Britvitch I ; Camara M ; Carmona E ; Chilingarian A ; Ciprini S ; Coarasa JA ; Commichau S ; Contreras JL ; Cortina J ; Curtef V ; Danielyan V ; Dazzi F ; De Angelis A ; de los Reyes R ; De Lotto B ; Domingo-Santamaria E ; Dorner D ; Doro M ; Errando M ; Fagiolini M ; Ferenc D ; Fernandez E ; Firpo R ; Flix J ; Fonseca MV ; Font L ; Fuchs M ; Galante N ; Garczarczyk M ; Gaug M ; Giller M ; Goebel F ; Hakobyan D ; Hayashida M ; Hengstebeck T ; Hohne D ; Hose J ; Hsu CC ; Isar PG ; Jacon P ; Kalekin O ; Kosyra R ; Kranich D ; Laatiaoui M ; Laille A ; Lenisa T ; Liebing P ; Lindfors E ; Lombardi S ; Longo F ; Lopez J ; Lopez M ; Lorenz E ; Lucarelli F ; Majumdar P ; Maneva G ; Mannheim K ; Mansutti O ; Mariotti M ; Martinez M ; Mase K ; Mazin D ; Merck C ; Meucci M ; Meyer M ; Miranda JM ; Mirzoyan R ; Mizobuchi S ; Moralejo A ; Nilsson K ; Ona-Wilhelmi E ; Orduna R ; Otte N ; Oya I ; Paneque D ; Paoletti R ; Paredes JM ; Pasanen M ; Pascoli D ; Pauss F ; Pavel N ; Pegna R ; Persic M ; Peruzzo L ; Piccioli A ; Poller M ; Pooley G ; Prandini E ; Raymers A ; Rhode W ; Ribo M ; Rico J ; Riegel B ; Rissi M ; Robert A ; Romero GE ; Rugamer S ; Saggion A ; Sanchez A ; Sartori P ; Scalzotto V ; Scapin V ; Schmitt R ; Schweizer T ; Shayduk M ; Shinozaki K ; Shore SN ; Sidro N ; Sillanpaa A ; Sobczynska D ; Stamerra A ; Stark LS ; Takalo L ; Temnikov P ; Tescaro D ; Teshima M ; Tonello N ; Torres A ; Torres DF ; Turini N ; Vankov H ; Vitale V ; Wagner RM ; Wibig T ; Wittek W ; Zanin R ; Zapatero J. - In: SCIENCE. - ISSN 0036-8075. - 312(2006), pp. 1771-1773. |
| 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 LSI+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. |
| Handle: | http://hdl.handle.net/11390/882591 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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http://hdl.handle.net/11390/882591
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