On the X-ray heated skin of accretion disks

Nayakshin, Sergei
April 2000
AIP Conference Proceedings;2000, Vol. 510 Issue 1, p440
Academic Journal
We present a simple analytical formula for the Thomson depth of the X-ray heated skin of accretion disks valid at any radius and for a broad range of spectral indices of the incident X-rays, arbitrary geometry of the X-ray source, accretion rates and black hole masses. We expect that this formula may find useful applications in studies of geometry of the inner part of accretion flows around compact objects, and in several other astrophysically important problems, such as the recently observed X-ray “Baldwin” effect (i.e., monotonic decrease of Fe line’s equivalent width with the X-ray luminosity of AGN), the problem of missing Lyman edge in AGN, and line and continuum variability studies in accretion disks around compact objects. © 2000 American Institute of Physics.


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