High-energy observations of black hole binaries with the INTEGRAL satellite
Abstract
Black-hole binaries are important sources through which studying accretion onto compact objects. In the X/gamma-ray domain, these objects show several and complex spectral behaviours and transitions. Based on INTEGRAL observations collected during the last eightyears, we have now a new view on the high energy emission of black-hole binary. An additional component above 200 keV has been observed in a few systems, during either hard/intermediate or low/hard states. The nature of this hard-tail is still debated, as also the one observed in soft states. However, among a number of models, it is usually attributed to the presence of a small fraction of non-thermal electrons in a hot-Comptonising plasma. I review the high energy emission from black hole binary systems and report on some INTEGRAL observations of three different objects: 1E 1740.7-2942, GX 339-4, Cyg X-1.
Keywords
Cite
@article{arxiv.1209.2880,
title = {High-energy observations of black hole binaries with the INTEGRAL satellite},
author = {Melania Del Santo},
journal= {arXiv preprint arXiv:1209.2880},
year = {2015}
}
Comments
12 pages, 14 figures, III Italian-Pakistani workshop on Relativistic Astrophysics (Lecce 20-22 JUNE 2011) proceeding