Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2010-07-15
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
18 pages, 7 figures, to appear in Proceedings of ICREA Workshop on The High-Energy Emission from Pulsars and their Systems (HE
Scientific paper
In the past ten years of regular operations, a new generation of Cherenkov telescopes have established binary systems as a new class of Very High Energy gamma-ray (VHE) emitters. Particle acceleration in these systems may occur either in an accretion-powered jet (microquasar) or in the shock between a pulsar wind and a stellar wind (wind-wind). This paper describes the phenomenology of the three VHE binaries PSR~B1259-63, LS 5039 and LS I +61 303. Two other objects may belong to this new class: HESS J0632+057 is a point-like variable VHE source whose multiwavelength behaviour resembles that of the other binaries, whereas Cyg X-1 is a well-known accreting system which may have been detected in VHE during a flaring episode. The paper concludes with a review of the latest searches for other binaries with Cherenkov telescopes, with special emphasis on Cyg X-3.
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