Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-08-31
Astrophys.J. 621 (2005) 372-387
Astronomy and Astrophysics
Astrophysics
30 pages, 18 figures, submitted to ApJ; corrected references
Scientific paper
10.1086/427278
We present calculations of non-LTE, relativistic accretion disk models applicable to the high/soft state of black hole X-ray binaries. We include the effects of thermal Comptonization and bound-free and free-free opacities of all abundant ion species. We present spectra calculated for a variety of accretion rates, black hole spin parameters, disk inclinations, and stress prescriptions. We also consider nonzero inner torques on the disk, and explore different vertical dissipation profiles, including some which are motivated by recent radiation MHD simulations of magnetorotational turbulence. Bound-free metal opacity generally produces significantly less spectral hardening than previous models which only considered Compton scattering and free-free opacity. It also tends to keep the effective photosphere near the surface, resulting in spectra which are remarkably independent of the stress prescription and vertical dissipation profile, provided little dissipation occurs above the effective photosphere. We provide detailed comparisons between our models and the widely used multicolor disk model. Frequency dependent discrepancies exist that may affect the parameters of other spectral components when this simpler disk model is used to fit modern X-ray data. For a given source, our models predict that the luminosity in the high/soft state should approximately scale with the fourth power of the empirically inferred maximum temperature, but with a slight hardening at high luminosities. This is in good agreement with observations. (abridged)
Blaes Omer M.
Davis Shane W.
Hubeny Ivan
Turner Neal James
No associations
LandOfFree
Relativistic Accretion Disk Models of High State Black Hole X-ray Binary Spectra does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Relativistic Accretion Disk Models of High State Black Hole X-ray Binary Spectra, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Relativistic Accretion Disk Models of High State Black Hole X-ray Binary Spectra will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-689046