Properties of warm absorbers in active galaxies
Abstract
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.
- Publication:
-
Highlights in X-ray Astronomy
- Pub Date:
- 1999
- DOI:
- 10.48550/arXiv.astro-ph/9808205
- arXiv:
- arXiv:astro-ph/9808205
- Bibcode:
- 1999hxra.conf..147K
- Keywords:
-
- WARM ABSORBERS;
- DUST;
- SEYFERT GALAXIES;
- PHOTOIONIZATION MODELS;
- X-RAY OBSERVATIONS;
- INDIVIDUAL GALAXIES: IRAS 13349+2438;
- IRAS 17020+4544;
- 4C74.26;
- PG1404+226;
- Astrophysics
- E-Print:
- 4 pages incl. 3 figures, to appear in the proceedings of `Highlights in X-ray astronomy', B. Aschenbach et al. (eds.)