NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-26 T23:02:20 PDT
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For refcode 1999MNRAS.307...41R:
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NED Abstract

Copyright by Royal Astronomical Society. 1999MNRAS.307...41R Consistency of accretion discs with Seyfert 1 UV fluxes and H{beta} emission-line profiles E. Rokaki and C. Boisson Accepted 1999 February 8. Received 1999 February 8: in original form 1998 May 14 ABSTRACT This paper presents accretion disc fits to the UV continuum and H{beta} emission line in a complete sample of broad-emission-line AGN sources. Disc fits to the UV continuum emission leave an ambiguity between the central mass and the orientation of the disc in that more massive black holes mimic more edge-on discs. The opposite dependence between mass and orientation is derived from disc fits to the broad-line profile. Fitting both continuum shape and line profile consistently can thus lead to a unique determination of the two parameters. Models consistent with the two emission components have a low inclination (with means equal to ~25^deg^ and 35^deg^ for extreme Kerr and Schwarzschild black holes respectively), supporting orientation-dependent unification schemes. The derived masses confirm the non-linearity between mass and luminosity for AGN, and rule out a pure luminosity evolution of distant quasars to nearby Seyfert 1 nuclei. Finally, the disc irradiation and the size of the H{beta} emission region are estimated. Key words: accretion, accretion discs - galaxies: active - galaxies: nuclei - galaxies: Seyfert - ultraviolet: galaxies.
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