The Iron Line Background

Details The Iron Line Background The Iron Line Background

2005-01-25

arxiv.org/abs/astro-ph/0501542v1

Astrophys.J. 621 (2005) L5-L8

Astronomy and Astrophysics

Astrophysics

5 pages, 2 figures, ApJ Letters in press (include emulateapj.sty)

Scientific paper

10.1086/428928

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.

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