BH activity and star formation at z+0.6-4 in the CDFS

Details BH activity and star formation at z+0.6-4 in the CDFS BH activity and star formation at z+0.6-4 in the CDFS

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cfdd.confe..74b&link_type=abstract

Chandra's First Decade of Discovery, Proceedings of the conference held 22-25 September, 2009 in Boston, MA. Edited by Scott Wo

Physics

Agn Evolution

Scientific paper

The co-evolution of host galaxies and the active black holes which reside in their centre is one of the most important topics in modern observational cosmology. Here we present a study of the properties of obscured Active Galactic Nuclei (AGN) detected in the CDFS 1Ms Chandra observation and their host galaxies. We found that X-ray selected (L_X>10^{42} erg/s) AGN show Spitzer colors consistent with both AGN and starburst dominated infrared continuum; the latter would not have been selected as AGN from infrared diagnostics. The host galaxies of X-ray selected obscured AGN are all massive (M*>10^{10} M_{sun}) and, in 50% of the cases, are also actively forming stars (1/SSFR1 and M*>3×10^{11} M_{sun}, a fraction significantly higher than in the local Universe for AGN of similar luminosities.

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