The Iron Line Background
Astrophysics
2009-11-10 v1
Abstract
We investigate the presence of iron line emission among faint X-ray sources identified in the 1Ms Chandra Deep Field South and in the 2Ms Chandra Deep Field North. Individual source spectra are stacked in seven redshift bins over the range z=0.5-4. We find that iron line emission is an ubiquitous property of X-ray sources up to z~3. The measured line strengths are in good agreement with those expected by simple pre-Chandra estimates based on X-ray background synthesis models. The average rest frame equivalent width of the iron line does not show significant changes with redshift.
Cite
@article{arxiv.astro-ph/0501542,
title = {The Iron Line Background},
author = {Marcella Brusa and Roberto Gilli and Andrea Comastri},
journal= {arXiv preprint arXiv:astro-ph/0501542},
year = {2009}
}
Comments
5 pages, 2 figures, ApJ Letters in press (include emulateapj.sty)