Testing the Unified Model with a Complete Sample of Hard X-ray Selected AGN

Details Testing the Unified Model with a Complete Sample of Hard X-ray Selected AGN Testing the Unified Model with a Complete Sample of Hard X-ray Selected AGN

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop50763f&link_type=abstract

Spitzer Proposal ID #50763

Physics

Scientific paper

The hard X-ray (17-60 keV) INTEGRAL survey provides, for the first time, a nearly unbiased, complete sample of 69 emission line AGN selected directly by their accretion luminosity almost unaffected by absorption. By combining the hard X-ray selection with infrared observations of the re-radiated emission that originates in the geometrically thick torus, we can probe the physics of the re-radiation and the structure of the torus by investigating the details of the correlation between X-ray and mid-IR luminosities. New IRS, IRAC, and MIPS observations, combined with Spitzer archival data, will yield a complete data set for all 69 INTEGRAL AGN. With this sample, we will test the unified model by comparing the 17-60 keV band luminosity with that of the mid-infrared (MIR), test the Spitzer IR color-color selection of AGN using an unbiased X-ray selected AGN sample, test the optical R-band -- MIR separation of absorbed and unabsorbed AGNs, study the relation between silicate emission/absorption and AGN X-ray properties including luminosity and absorption, and derive a ``representative'' SED (and dispersion) for AGN of modest luminosity suitable for use beyond the local universe. Because our sample has well-defined statistical properties, we will measure the total energy release by AGNs (except for the contribution of extremely Compton thick sources) and therefore the total growth rate of supermassive black holes in the local Universe.

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