The Iron Line Background
- 27 January 2005
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 621 (1) , L5-L8
- https://doi.org/10.1086/428928
Abstract
We investigate the presence of iron line emission among faint X-ray sources identified in the 1 Ms Chandra Deep Field-South and in the 2 Ms 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 a 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.Keywords
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