The warm absorber in IRAS 13349+2438: dusty or not?
| dc.creator | Siebert, J. | |
| dc.creator | Komossa, S. | |
| dc.creator | Brinkmann, W. | |
| dc.date | 1999-09-18 | |
| dc.date.accessioned | 2026-07-07T02:33:22Z | |
| dc.date.available | 2026-07-07T02:33:22Z | |
| dc.description | IRAS13349+2438 was the first quasar suggested to host a warm absorber with internal dust. We obtained new HRI data for this object and derive constraints on the X-ray emitting region of IRAS13349+2438 by investigating its X-ray extent and lightcurve. Rapid X-ray variability is detected with a factor of two change in count rate within one day and 20% variability within about three hours, which practically rules out any significant contribution of scattered X-rays. We present for the first time a detailed, self-consistent modeling of the ROSAT PSPC and ASCA spectrum of IRAS13349+2438 in terms of a warm absorber including dust. It turns out that both a dust-free and a dusty single-component warm absorber fail to explain the ROSAT, ASCA, and optical data simultaneously. We discuss possible explanations such as a variable and/or complex warm absorber, a variable soft X-ray continuum and instrumental effects. | |
| dc.description | 10 pages, 6 figures, to appear in Astronomy & Astrophysics | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9909323 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9909323 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/14811 | |
| dc.subject | Astrophysics | |
| dc.title | The warm absorber in IRAS 13349+2438: dusty or not? | |
| dc.type | text |