Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...207.6211m&link_type=abstract
American Astronomical Society Meeting 207, #62.11; Bulletin of the American Astronomical Society, Vol. 37, p.1246
Astronomy and Astrophysics
Astronomy
Scientific paper
We report our first results on the angular structure in the X-ray sources detected in the first-year XMM-Newton Observations on the 2 deg2 COSMOS-field. We were able to measure the angular auto-correlation functions (ACFs) down to ˜ 0.5 arcmin up to ˜ 10-20 arcmin for the X-ray point sources (AGN dominated) detected in 0.5-2, 2-4.5, and 4.5-10 keV bands. We have used the expected redshift distributions from the latest AGN population synthesis models and/or AGN luminosity functions to invert the ACF using Limber's equation and calculated the correlation lengths.
We also present the results from the cross-correlation function (CCF) between the X-ray sources and galaxies divided into photometric redshift bins. By correlating with a much larger number of galaxies, the CCF can measure the environment of AGNs in a much better statistical precision. We discuss redshift dependence of the AGN clustering properties through the CCF.
Cosmos Team
COSMOS XMM-Newton Team
Miyaji Takamitsu
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