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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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Bulletin of the American Astronomical Society, 36 5
© 2004. The American Astronomical Society.