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The Iron Line Background

Marcella Brusa·Roberto Gilli·Andrea Comastri
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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.

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Marcella Brusa, Roberto Gilli, Andrea Comastri. 2005-01-25. The Iron Line Background. https://doi.org/10.1086/428928

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