Properties of warm absorbers in active galaxies

Details Properties of warm absorbers in active galaxies Properties of warm absorbers in active galaxies

1998-08-19

arxiv.org/abs/astro-ph/9808205v1

Astronomy and Astrophysics

Astrophysics

4 pages incl. 3 figures, to appear in the proceedings of `Highlights in X-ray astronomy', B. Aschenbach et al. (eds.); a meeti

Scientific paper

We present a study of the nature of warm absorbers on the basis of ROSAT X-ray observations and photoionization calculations carried out with the code Cloudy. We focus on `non-standard' warm absorbers: (i) the proposed dusty warm absorbers in IRAS 13349+2438 and IRAS 17020+4544, and possibly in 4C +74.26; (ii) we explore several scenarios to account for the recently observed peculiar absorption features around 1.1 keV on the basis of detailed photoionization models, and apply these to PG 1404+226.

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