The spectra of accretion discs in active galactic nuclei

Details The spectra of accretion discs in active galactic nuclei The spectra of accretion discs in active galactic nuclei

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.258..189r&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 258, no. 1, Sept. 1, 1992, p. 189-197. Research support

Astronomy and Astrophysics

Astronomy

156

Accretion Disks, Active Galactic Nuclei, Emission Spectra, X Ray Astronomy, Black Holes (Astronomy), Compton Effect, X Ray Spectra

Scientific paper

We present fully self-consistent calculations of the spectra emitted by accretion disks in active galactic nuclei. We treat the inner, radiation-pressure-dominated regions of standard alpha-disks. Incoherent Compton scattering and emission/absorption of radiation by hydrogen and helium are included in compting the vertical temperature structure within the disk and the emergent spectrum. Comptonization modifies the EUV/soft X-ray continuum and the He II spectral features. In particular, an important fraction of the emergent luminosity appears in the form of a steep soft X-ray spectrum. The observed UV flux and soft X-ray excess of Mkn 841 are consistent with a face-on accretion disk with alpha = 0.1 surrounding a black hole.

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