The origin of the Iron X-ray K_alpha line in Active Galactic Nuclei

Details The origin of the Iron X-ray K_alpha line in Active Galactic Nuclei The origin of the Iron X-ray K_alpha line in Active Galactic Nuclei

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aax..proc...75m&link_type=abstract

Atelier d'astronomie X, X-ray Astronomy workshop, held in Toulouse (France), September 20, 2000, Eds. J. Ballet (jballet@cea.fr)

Astronomy and Astrophysics

Astronomy

Scientific paper

Most of Seyfert 1 galaxies exhibit a broad Fe Kalpha emission line at 6.4 keV, characterized by a narrow core and an extended red wing. This line together with a hump in the continuum around 30 keV indicates the presence of a reflected component on a rather cold material. Mainly two kinds of explanations have been proposed to account for the shape of this line: relativistic effects occuring in the innermost regions of an accretion disk and multi-Compton broadening in cold clouds embedded in a hot medium. Line variability behavior is difficult to understand in the framework of the first model.

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