AAS 205th Meeting, 9-13 January 2005
Session 163 New Results from the Great Observatories Origins Deep Survey
Special Session, Thursday, January 13, 2005, 2:00-3:30pm, Town and Country

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[163.10] The GOODS AGN population and the X-ray Background

E. Treister, C.M. Urry, E. Chatzichristou (Yale University), F.E. Bauer, D.M. Alexander (IoA Cambridge), A. Koekemoer (STScI), J. Van Duyne (Yale University), W.N. Brandt (Penn State), J. Bergeron (IAP Paris), D. Stern (JPL/Caltech), L.A. Moustakas (STScI), R.-R. Chary (SSC/Caltech), C.J. Conselice (Caltech), S. Cristiani (Obs. Astr. Trieste), N. Grogin (JHU)

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.

The author(s) of this abstract have provided an email address for comments about the abstract: treister@astro.yale.edu

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© 2004. The American Astronomical Society.