X-ray emitting-absorbing media in Seyfert 1 galaxies
| dc.creator | Mouchet, M. | |
| dc.creator | Abrassart, A. | |
| dc.creator | Porquet, D. | |
| dc.creator | Dumont, A. -M. | |
| dc.creator | Collin, S. | |
| dc.date | 2000-03-13 | |
| dc.date.accessioned | 2026-07-07T01:52:43Z | |
| dc.date.available | 2026-07-07T01:52:43Z | |
| dc.description | 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. | |
| dc.description | 8 pages, 3 figures, to appear in Proc. "AGN in their Cosmic Environment", Eds. B. Rocca-Volmerange & H. Sol, EDPS Conf. Series in Astron. & Astrophysics | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0003168 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0003168 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/713 | |
| dc.subject | Astrophysics | |
| dc.title | X-ray emitting-absorbing media in Seyfert 1 galaxies | |
| dc.type | text |