出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present angle-dependent, broad-band theoretical spectra from slim accretion disks around stellar mass black hole. In our numerical calculations, full radiative transfer of accretion disk atmospheres was solved including effects of Compton scattering, free-free and all important boundfree transitions of 10 most abundant elements. Moreover, we included the fundamental series of lines from helium-like and hydrogen-like iron. Our results show, that for high accretion rate combined with high black hole spin temperature of inner radii in the disk is of the order of 107 K. Lines of highly ionized iron can be seen in absorption. Continuum X-ray spectra exhibit numerous absorption edges of heavy elements and this shape affects determination of hardening factor, which is used to measure black hole spin. We show that the value of total disk hardening factor strongly depends on the method of its determination. Therefore, black hole spin measurements using total disk hardening factors are highly uncertain.
