Nordita Astrophysics seminars

Fingerprints of hot accretion in X-ray binaries

by Dr Alexandra Veledina (Nordita)

122:026 ()


Accreting black hole binaries have been in focus of the X-ray telescopes for the last half a century. Yet, radiative mechanisms leading to a formation of the high energy photons along with the accretion flow geometry in these objects are still being debated. Recent discovery of complex interconnection of the optical and X-ray light-curves opened a new path to explore physical processes operating in these objects. A number of observables such as high optical luminosity, rapid variability and presence of quasi-periodic oscillations at these wavelengths as well as complex optical/X-ray cross-correlation cannot be explained in terms of the standard accretion disc model. I will describe how the whole set of these properties can be explained in terms of the hot accretion flow model.