Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-03-13
Astronomy and Astrophysics
Astrophysics
8 pages, 3 figures, to appear in Proc. "AGN in their Cosmic Environment", Eds. B. Rocca-Volmerange & H. Sol, EDPS Conf. Series
Scientific paper
Seyfert galaxies have been shown to exhibit a large variety of features in their X-ray spectra from which the environment of the central engine can be deduced. We focus on the two following aspects: the Warm Absorber, mainly responsible of the soft X-ray properties, and the reprocessing/reflecting plasma medium at the origin of the iron Kalpha fluorescent line. The physical parameters and the location of the so-called Warm Absorber (WA), a photoionized medium along the line of sight to the nuclear region, are more strongly constrained by optical coronal lines than by the oxygen edges observed in the soft X-rays and produced by the WA. The photoionization models also predict the intensities of the X-ray emission lines which are going to be detected with the new generation of X-ray satellites. An alternative model to the relativistic accretion disc is proposed to explain the profile of the X-ray iron Kalpha line observed in the Seyfert 1. This line can be formed in the framework of a quasi-spherical accretion of optically thick clouds. An optically thick photoionization code coupled with a Monte-Carlo code has been developed to compute the entire spectrum from the IR to the hard X-rays for a close geometry with a large covering factor. The multiple Compton reflections allow to reproduce the redshifted broad iron line as detected in several Seyfert 1 galaxies and in MCG-6-30-15.
Abrassart A.
Collin Suzy
Dumont Anne-Marie
Mouchet Martine
Porquet Delphine
No associations
LandOfFree
X-ray emitting-absorbing media in Seyfert 1 galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with X-ray emitting-absorbing media in Seyfert 1 galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and X-ray emitting-absorbing media in Seyfert 1 galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-148705