Recurrent microblazar activity in Cygnus X-1?

Details Recurrent microblazar activity in Cygnus X-1? Recurrent microblazar activity in Cygnus X-1?

2002-08-28

arxiv.org/abs/astro-ph/0208495v1

Astron.Astrophys. 393 (2002) L61-L64

Astronomy and Astrophysics

Astrophysics

4 pages, 5 figures, Accepted for publication in Astronomy & Astrophysics Letters

Scientific paper

10.1051/0004-6361:20021205

Recurrent flaring events at X- and soft gamma-ray energies have been recently reported for the galactic black hole candidate Cygnus X-1. The observed fluxes during these transient outbursts are far higher than what is observed in ``normal'' episodes. Here we suggest that the origin of this radiation is non-thermal and produced by inverse Compton interactions between relativistic electrons in the jet and external photon fields, with a dominant contribution from the companion star field. The recurrent and relatively rapid variability could be explained by the precession of the jet, which results in a variable Doppler amplification.

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