The history of the density of Active Galactic Nuclei

Details The history of the density of Active Galactic Nuclei The history of the density of Active Galactic Nuclei

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004head....8.0303l&link_type=abstract

American Astronomical Society, HEAD meeting #8, #03.03; Bulletin of the American Astronomical Society, Vol. 36, p.907

Mathematics

Logic

Scientific paper

We present the measure of the cosmological evolution of the density of AGN and their NH distribution up to redshift 4, as a function of the unabsorbed 2-10 keV luminosity and redshift. We used the new 2-10 keV HELLAS2XMM sample combined with other published 2-10 keV catalogs. A total of about 500 AGN have been used. Our best fit is a luminosity dependent density evolution (LDDE) model. The data show a significant increase of the fraction of absorbed (LogNH>22) AGN at low X-ray luminosities. A less significant increase of the fraction of absorbed AGN at high reshift is also found. Our best fit solution provides a god fit to a) the cosmic X-ray background; b) the observed counts; and c) the observed fraction of absorbed AGN as a function of the flux.

Affiliated with

Also associated with

No associations

Rating

The history of the density of 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 history of the density of Active Galactic Nuclei, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The history of the density of Active Galactic Nuclei will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1174891