Clustering of ROSAT All-Sky Survey AGNs Through Cross-Correlation Functions

Details Clustering of ROSAT All-Sky Survey AGNs Through Cross-Correlation Functions Clustering of ROSAT All-Sky Survey AGNs Through Cross-Correlation Functions

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1248..455k&link_type=abstract

X-RAY ASTRONOMY 2009; PRESENT STATUS, MULTI-WAVELENGTH APPROACH AND FUTURE PERSPECTIVES: Proceedings of the International Confer

Computer Science

Databases

Galactic Nuclei, Redshift, Sky Surveys, Brightness, Galactic Nuclei, Circumnuclear Matter, And Bulges, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies, Astronomical Catalogs, Atlases, Sky Surveys, Databases, Retrieval Systems, Archives, Etc., Magnitudes And Colors, Luminosities

Scientific paper

We investigate the clustering propertiesof ~1550 low-redshift broad-line AGNs detected in the ROSAT All-Sky Survey (RASS) through a cross-correlation function (CCF) with ~46000 Luminous Red Galaxies (LRGs) in the Sloan Digital Sky Survey (SDSS). Using this approach, we avoid small-number statistics and systematic errors caused by the variation of the Galactic absorption compared to a direct measurement of the AGN auto-correlation function (ACF).
We compute the ACF of low-z RASS-AGN based on the CCF for the total X-ray sample ( = 0.25) and found a correlation length of r0 = 4.3-0.4+0.4 h-1 Mpc. Furthermore, we discovered an X-ray luminosity dependence of the clustering signal, i.e. high luminosity AGN cluster stronger than low luminosity AGN. We have also applied a Halo Occupation Distribution (HOD) model directly to our AGN-LRG CCF.

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