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Title: Variable Very-High-Energy Gamma-Ray Emission from the Microquasar LS I +61 303
Author: Albert, J.
Aliu, E.
Armada, A.
Bordas Coma, Pol
Bosch i Ramon, Valentí
Cortina Blanco, Juan
Domingo Santamaría, Eva
Errando, M.
Fernández, Enrique
Firpo, R.
Flix, J.
López, J.
Martinez, Manuel
Moralejo, Abelardo
Oña-Wilhelmi, E.
Paredes i Poy, Josep Maria
Ribó Gomis, Marc
Sidro Martín, Núria
Tescaro, Diego
Zapatero, J.
Keywords: Quàsars
Estels binaris
Raigs còsmics
Jets (Astrofísica)
Astronomia de raigs gamma
Double stars
Radio astronomy
Cosmic rays
Astrophysical jets
Gamma ray astronomy
Issue Date: 2006
Publisher: American Association for the Advancement of Science
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.
Note: Versió postprint del document publicat a:
It is part of: Science, 2006, vol. 312, num. 5781, p. 1771-1773
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ISSN: 0036-8075
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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