Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aipc..431..171h&link_type=abstract
Accretion processes in astrophysical systems: Some like it hot! - eigth astrophysics conference. AIP Conference Proceedings, Vo
Astronomy and Astrophysics
Astrophysics
5
Active And Peculiar Galaxies And Related Systems, Infall, Accretion, And Accretion Disks, Radiation Mechanisms, Polarization
Scientific paper
We present self-consistent models of the vertical structure and emergent spectrum of AGN accretion disks. The central object is assumed to be a supermassive Kerr black hole. We demonstrate that non-LTE effects and the effects of a self-consistent vertical structure of a disk play a very important role in determining the emergent radiation, and therefore should be taken into account. In particular, non-LTE models exhibit a largely diminished H I Lyman discontinuity, and strong emission in the He II Lyman discontinuity. Consequently, the number of ionizing photons in the He II Lyman continuum predicted by non-LTE disk models is by 1-2 orders of magnitude higher than that following from the black-body approximation. We have also shown that metal line opacities are very important in predicting emergent spectra from AGN disks.
Hubeny Ivan
Hubeny Veronika
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