2012/03/14 by Melania Del Santo · 2 citations
Earth and Planetary Sciences · Physics and Astronomy · #Accretion (finance) #Accretion disc #Astrophysical Phenomena and Observations #Astrophysics and Cosmic Phenomena #Binary number #Binary star #Black hole (networking) #Component (thermodynamics) #Earth Systems and Cosmic Evolution #Satellite #X-ray binary #astro-ph.GA #astro-ph.HE
paper · pdf · doi:10.1088/1742-6596/354/1/012003
published in Journal of Physics Conference Series 354, 012003 (IOP Publishing) · 12 pages, 14 figures, III Italian-Pakistani workshop on Relativistic Astrophysics (Lecce 20-22 JUNE 2011) proceeding
openalex publication_date 2012/03/14 · arxiv created 2012/09/13 · arxiv updated 2015/06/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Black-hole binaries are important sources through which studying accretion onto compact objects. In the X/ γ -ray domain, these objects show several and complex spectral behaviours and transitions. Based on INTEGRAL observations collected during the last eight years, 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.