6th FERO meeting

ASTRONOMICAL INSTITUTE
ACADEMY OF SCIENCES, PRAGUE
Boční II 1401, 141 00 Praha 4
Czech Republic

30th – 31st of August 2012



Euro in Czech Crowns: 1€ = Kč
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August



Vjačeslav Sochora

The relativistic iron line produced by a viscously spreading ring near a massive black hole

[presentation]

We consider a spectral line formed by an X-ray illumination of an accretion ring near a supermassive rotating black hole. The ring is assumed to be gradually dissolved by viscous processes. We consider a simple model spectrum consisting of a power-law primary continuum and K-alpha reflection line of iron, and we show how the observed spectral profile changes in time. Model parameters are view angle of the observer, spin of the black hole, the initial radius of the ring, and its viscosity parameter.