The GOODS AGN population and the X-ray Background

Details The GOODS AGN population and the X-ray Background The GOODS AGN population and the X-ray Background

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20516310t&link_type=abstract

American Astronomical Society Meeting 205, #163.10; Bulletin of the American Astronomical Society, Vol. 36, p.1616

Astronomy and Astrophysics

Astronomy

Scientific paper

We model the X-ray, optical, and mid-infrared flux distributions of AGN in the GOODS fields, starting from hard X-ray luminosity functions and spectral energy distributions appropriate to the unified scheme for AGN. Assuming roughly 3 times as many obscured as unobscured AGN, this model is able to reproduce the observed distributions and statistical properties of the X-ray sources in the GOODS fields and at the same time is consistent with both the spectral shape and normalization of the X-ray background. This model also predicts that only half of the AGN in the GOODS fields have been detected in X-rays with Chandra 1--2 Msec exposures. The remaining obscured/low-luminosity AGN are predicted to appear as luminous infrared sources and as normal early-type galaxies in the optical, which will be identified as AGN using the Spitzer observations of the GOODS fields and with surveys at higher energies (10-100 keV).
Based on observations obtained with the NASA/ESA Hubble Space Telescope, which is operated by the Association of Universities for Research in Astronomy (AURA), Inc, under NASA contract NAS5-26555. This work was supported by NASA grants HST-GO-09425(.01-A,.13-A,.26-A); NSF CAREER award AST 99-83783; NASA contract number 1224666 issued by JPL/Caltech under NASA contract 1407; ASI grant I/R/088/02; and a Royal Society University Research Fellowship.

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