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"Variability from black hole accretion flows and the origin of QPO's"
Prof. Chris Done
University. of Durham, U.K.

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When:  Wednesday, 30th of September of 2009 at 3:15pm
Where: 2nd Floor Seminar Room

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Abstract:

I will describe the rapid variability seen from accretion flows around 
stellar mass black holes, and show how this can be quantitatively
as well as qualitatively explained by the changing accretion flow
geometry in the truncated disc/hot inner flow model. I will show 
especially how the prominent low frequency QPO can be made by 
vertical precession (Lense-Thirring) of the hot flow. I will scale these 
models up to the supermassive black holes, and speculate on the 
origin of the AGN QPO seen in REJ1034+396.


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