Coronal origin of the polarization of the high-energy emission of Cygnus X-1

Author： Romero G. E.   Vieyro F. L.   Chaty S.  

Publisher： Edp Sciences

E-ISSN： 1432-0746|562|issue|L7-L7

ISSN： 0004-6361

Source： Astronomy & Astrophysics, Vol.562, Iss.issue, 2014-02, pp. : L7-L7

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Abstract

Context. Cygnus X-1 is the candidate with the highest probability of containing a black hole among the X-ray binary systems in the Galaxy. It is also by far the most often studied of these objects. Recently, the International Gamma-Ray Astrophysics Laboratory Imager on board the Integral satellite (INTEGRAL/IBIS) detected strong polarization in the high-energy radiation of this source, between 400 keV and 2 MeV. This radiation has been attributed to a jet launched by the black hole.

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