Universal spectral shape of AGN with high accretion rate

Details Universal spectral shape of AGN with high accretion rate Universal spectral shape of AGN with high accretion rate

2003-09-09

arxiv.org/abs/astro-ph/0309270v1

Nucl.Phys.Proc.Suppl.132:201-204,2004

Astronomy and Astrophysics

Astrophysics

4 pages, 5 figures, 1 table, Proc. of the meeting: "The Restless High-Energy Universe" (Amsterdam, The Netherlands)

Scientific paper

10.1016/j.nuclphysbps.2004.04.03

The spectra of radio quiet and NLS1 galaxies show suprising similarity in their shape. They seem to scale only with the accretion rate but not with central black hole mass. We consider two mechanisms modifying the disk spectrum. First, the outer parts of the disk are irradiated by the flux emerging from the inner parts. This is due to the scattering of the flux by the extended hot medium (warm absorber). Second process is connected with the development of the disk warm Comptonizing skin above the disk and/or coronae. Our scenario applies only to object with relatively high luminosity to the Eddington luminosity ratio for which disk evaporation is inefficient.

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