Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-02-03
Mon.Not.Roy.Astron.Soc.Lett. 368 (2006) L62-L66
Astronomy and Astrophysics
Astrophysics
5 pages, 2 figures, accepted for publication in MNRAS Letters
Scientific paper
10.1111/j.1745-3933.2006.00158.x
X-ray observations with Chandra and XMM-Newton have shown that there are relatively narrow cores to the iron K-alpha emission lines in active galactic nuclei (AGN). Plausible origins for this core emission include the outer regions of an accretion disk, a pc-scale molecular torus, and the optical broad-line region (BLR). Using data from the literature it is shown that no correlation exists between the Fe K-alpha core width and the BLR (specifically H-beta) line width. This shows that in general the iron K-alpha core emission does not arise from the BLR. There is a similar lack of correlation between the width of the Fe K-alpha core and black hole mass. The average K-alpha width is about a factor of two lower than the H-beta width. It therefore seems likely that in many cases the narrow core arises in the torus. There is a very wide range of observed Fe K-alpha core widths, however, and this argues for multiple origins. The simplest explanation for the observed line profiles in AGN is that they are due to a mixing of very narrow emission from the inner edge of the torus, and broadened emission from the accretion disk, in varying proportions from object-to-object.
No associations
LandOfFree
On the origin of the Fe K-alpha line cores in Active Galactic Nuclei does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with On the origin of the Fe K-alpha line cores in Active Galactic Nuclei, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the origin of the Fe K-alpha line cores in Active Galactic Nuclei will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-484343