Reprocessing of X-rays in AGN. I. Plane parallel geometry -- test of pressure equilibrium

Details Reprocessing of X-rays in AGN. I. Plane parallel geometry -- test of pressure equilibrium Reprocessing of X-rays in AGN. I. Plane parallel geometry -- test of pressure equilibrium

2002-03-13

arxiv.org/abs/astro-ph/0203202v1

Astronomy and Astrophysics

Astrophysics

accepted for publication in Astronomy and Astrophysics

Scientific paper

10.1051/0004-6361:20020368

We present a model of the vertical stratification and the spectra of an irradiated medium under the assumption of constant pressure. Such a solution has properties intermediate between constant density models and hydrostatic equilibrium models, and it may represent a flattened configuration of gas clumps accreting onto the central black hole. Such a medium develops a hot skin, thicker than hydrostatic models, but thinner than constant density models, under comparable irradiation. The range of theoretical values of the alpha_ox index is comparable to those from hydrostatic models and both are close to the observed values for Seyfert galaxies but lower than in quasars. The amount of X-ray Compton reflection is consistent with the observed range. The characteristic property of the model is a frequently multicomponent iron K alpha line.

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