1998/08/19 by Stefanie Komossa, S. Komossa, Komossa, Stefanie +3
Physics and Astronomy · #Astrophysical Phenomena and Observations #Astrophysics (astro-ph) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9808205
4 pages incl. 3 figures, to appear in the proceedings of `Highlights in X-ray astronomy', B. Aschenbach et al. (eds.); a meeting held in Garching, June 1998
arxiv created 1998/08/19 · openalex publication_date 1998/08/19 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.