Testing models of X-ray reflection from irradiated disks

Details Testing models of X-ray reflection from irradiated disks Testing models of X-ray reflection from irradiated disks

2001-08-22

arxiv.org/abs/astro-ph/0108351v1

Mon.Not.Roy.Astron.Soc. 328 (2001) 616

Astronomy and Astrophysics

Astrophysics

8 pages, accepted for publication in MNRAS

Scientific paper

10.1046/j.1365-8711.2001.04917.x

We model the reflected spectrum expected from localized magnetic flares above an ionised accretion disk. We concentrate on the case of very luminous magnetic flares above a standard accretion disk extending down to the last stable orbit, and use a simple parameterisation to allow for an X-ray driven wind. Full disk spectra including relativistic smearing are calculated. When fit with the constant density reflection models, these spectra give both a low reflected fraction and a small line width as seen in the hard spectra from Galactic Black Hole Binaries and Active Galactic Nuclei. We fit our calculated spectra to real data from the low/hard state of Nova Muscae and Cyg X-1 and show that these models give comparable $\chi^2$ to those obtained from the constant density reflection models which implied a truncated disk. This explicitally demonstrates that the data are consistent with either magnetic flares above an ionized disk extending down to the last stable orbit around a black hole, or with non-ionized, truncated disks.

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