X-ray emission from two-phase accretion disks

Details X-ray emission from two-phase accretion disks X-ray emission from two-phase accretion disks

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ncimc..15..831h&link_type=abstract

Nuovo Cimento C, Serie 1 (ISSN 0390-5551), vol. 15 C, no. 5, p. 831-837.

Computer Science

Accretion Disks, Computerized Simulation, Coronas, Emission Spectra, Seyfert Galaxies, X Rays, Compton Effect, Monte Carlo Method, Optical Thickness

Scientific paper

We consider a 'two phase' accretion disk consisting of an optically thick layer with temperature T of about 10 exp 4 K embedded in a hot thin corona (T of about 10 exp 9 K). The main energy input occurs through magnetic heating of the electrons in the corona, while cooling is due to Compton losses of the hot electrons on the soft photons provided by the thick layer. We write the balance equations for the two phases. We show that a possible mode of variability yields steeper spectra for increasing soft-photon luminosity as observed in Seyfert galaxies and compute composite model spectra in the X-ray range, via Monte Carlo simulations.

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