The Evolution and Eddington Ratio Distribution of Compton Thick Active Galactic Nuclei

Details The Evolution and Eddington Ratio Distribution of Compton Thick Active Galactic Nuclei The Evolution and Eddington Ratio Distribution of Compton Thick Active Galactic Nuclei

2010-04-05

arxiv.org/abs/1004.0690v2

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

accepted ApJL

Scientific paper

Previous studies of the active galactic nuclei (AGN) contribution to the cosmic X-ray background (CXB) consider only observable parameters such as luminosity and absorbing column. Here, for the first time, we extend the study of the CXB to physical parameters including the Eddington ratio of the sources and the black hole mass. In order to calculate the contribution to the CXB of AGN accreting at various Eddington ratios, an evolving Eddington ratio space density model is calculated. In particular, Compton thick (CT) AGN are modeled as accreting at specific, physically motivated Eddington ratios instead of as a simple extension of the Compton thin type 2 AGN population. Comparing against the observed CT AGN space densities and log N-log S relation indicates that CT AGN are likely a composite population of AGN made up of sources accreting either at >90% or <1% of their Eddington rate.

Affiliated with

Also associated with

No associations

Rating

The Evolution and Eddington Ratio Distribution of Compton Thick 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 The Evolution and Eddington Ratio Distribution of Compton Thick Active Galactic Nuclei, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Evolution and Eddington Ratio Distribution of Compton Thick Active Galactic Nuclei will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-637656