2017 Zdziarski & De Marco 2020) Out of these all effects, the issue of the angular momentum budget is the most important one for our model since the existence of the shock requires the angular momentum removal to remain in the proper parameter space. As the gas spirals in, it flattens out into a spinning accretion disc, where it is heated intensely, emitting Xrays. Our time-dependent evolution of the hot flow does not yet include the interaction with the cold disk which likely overlaps with the hot flow at some range of radii even in the Hard State (e. The model we use is appropriate for black hole accretion due to the specific inner boundary conditions. 2001 Ingram & Done 2012) are automatically included by us. Close to the black hole lies the corona - a hot, optically thin region where X-rays undergo Compton scattering on energetic electrons. As a consequence, no light can escape the object, leading to many strange space and time related phenomena. A black hole is basically an object so massive that its escape velocity has exceeded the speed of light. The disk is heated by friction and produces intense X-ray emission. Cygnus X-1 is a source of X-rays in our Galaxy and the first such source to be attributed to the presence of a black hole. As the stellar material becomes superheated in the accretion disk of the. the shot behaviour in Cygnus X-1 using simultaneous AstroSat-NICER observation. The intense gravitational field of the black hole rips matter from the companion star onto a thin circulating accretion disk around the black hole. As x-ray telescopes became more precise, it was clear that Cygnus X-1 wasn’t connected to a bright optical source. On the other hand, we follow numerically the flow dynamics so all the aspects of the variability model based on the idea of the propagating fluctuations (Lyubarskii 1997 Kotov et al. 2022, The Astrophysical Journal Burst-Disk Interaction in 4U 1636-536 as. NuSTAR AND SUZAKU OBSERVATIONS OF THE HARD STATE IN CYGNUS X-1: LOCATING THE INNER ACCRETION DISK, Parker, M. Its X-ray spectrum is composed of blackbody and power law components. 2000) and significant emission of gamma rays (Albert et al. ( auth ) 1611 CYGNUS X - 1 : A TWO - TEMPERATURE ACCRETION DISK MODEL WHICH EXPLAINS THE OBSERVED HARD XRAY SPECTRUM.

Some comments on our outcome Our model cannot directly address the issue of the location of the specific emission component since the emissivity properties of the hot medium are not yet included in our model. Cygnus X-1 harbors an accretion disk, which is evident by its X-ray luminosity of (25.5)×1037 erg/s (Syunyaev & Trumper 1979, Dolan et al.

Cygnus x1 accretion disk xray telescope