Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..599..489a&link_type=abstract
X-RAY ASTRONOMY: Stellar Endpoints,AGN, and the Diffuse X-ray Background. Edited by Nicholas E. White, Giuseppe Malaguti, and G
Astronomy and Astrophysics
Astronomy
1
Galactic Nuclei, Circumnuclear Matter, And Bulges, Intergalactic Matter, Quasar Absorption And Emission-Line Systems, Lyman Forest, Active And Peculiar Galaxies And Related Systems, Radiative Transfer, Scattering, X-Ray Sources, X-Ray Bursts
Scientific paper
It has been suggested that the broad fluorescent X-ray Iron line profile observed in Seyfert 1 galaxies could be explained by Compton scattering in a hot Thomson thick medium, either by reflection (Abrassart 99) or by transmission (Misra and Kembhavi 1998). Here, using our transfer codes TITAN and NOAR (Dumont et al. 1999), we show that for the latter, the iron line and edge can be made consistent with the observed ones, provided the ionization parameter ξ exceeds 106 erg.cm.s-1, and the incident spectra has a low enough Compton temperature. This model implies a small black hole mass and an accretion rate close to the Eddington value. A very important effect of such a medium on the line of sight of the central UV/X-ray source is to smooth any intrinsic Lyman edge, thus solving a long standing puzzle. .
Abrassart A.
Dumont Anne-Marie
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