A model of the broad-band continuum of NGC 5548

Details A model of the broad-band continuum of NGC 5548 A model of the broad-band continuum of NGC 5548

1997-10-16

arxiv.org/abs/astro-ph/9710183v1

Astronomy and Astrophysics

Astrophysics

2 pages, no figures, LaTex, using crckspb.sty macro, to appear in Proceedings of IAU Symposium No. 188, `The Hot Universe', Au

Scientific paper

We discuss a model of the central source in Seyfert 1 galaxy NGC 5548. The model assumes a three phase disk structure consisting of a cold outer disk, a hot central disk constituting a Comptonizing X/gamma source, and an intermediate unstable and complex phase emitting a soft excess component. The model qualitatively explains broad-band spectrum and variability behavior assuming that the soft excess contributes significantly to the continuum emission and drives variability by geometrical changes of the intermediate disk zone.

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