High-precision multi-band measurements of the angular clustering of X-ray sources

Details High-precision multi-band measurements of the angular clustering of X-ray sources High-precision multi-band measurements of the angular clustering of X-ray sources

2009-04-20

arxiv.org/abs/0904.3024v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

14 pages, 9 figures, accepted for publication in Astronomy and Astrophysics

Scientific paper

In this paper we present the two-point angular correlation function of the X-ray source population of 1063 XMM-Newton observations at high Galactic latitudes, comprising up to ~30000 sources over a sky area of 125.5 sq. deg, in three energy bands: 0.5-2 (soft), 2-10 (hard), and 4.5-10 (ultrahard) keV. We have measured the angular clustering of our survey and find significant positive clustering signals in the soft and hard bands, and a marginal clustering detection in the ultrahard band. We find dependency of the clustering strength on the flux limit and no significant differences in the clustering properties between sources with high hardness ratios and those with low hardness ratios. Our results show that obscured and unobscured objects share similar clustering properties and therefore they both reside in similar environments, in agreement with the unified model of AGN. We deprojected the angular clustering parameters via Limber's equation to compute their typical spatial lengths. From that we have inferred the typical mass of the dark matter haloes in which AGN at redshifts of ~1 are embedded. The short AGN lifetimes derived suggest that AGN activity might be a transient phase that can be experienced several times by a large fraction of galaxies throughout their lives.

Affiliated with

Also associated with

No associations

Rating

High-precision multi-band measurements of the angular clustering of X-ray sources 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 High-precision multi-band measurements of the angular clustering of X-ray sources, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-precision multi-band measurements of the angular clustering of X-ray sources will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-174144