Are Compton-thick quasars hidden among the population of heavily obscured Spitzer-selected AGN?

Details Are Compton-thick quasars hidden among the population of heavily obscured Spitzer-selected AGN? Are Compton-thick quasars hidden among the population of heavily obscured Spitzer-selected AGN?

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006cxo..prop.2203v&link_type=abstract

Chandra Proposal ID #08700396

Computer Science

Chandra Proposal Id #08700396

Scientific paper

A fraction as high as 50-70% of the Seyfert 2 galaxies in the local Universe are obscured by cold gas, with column densities larger than Nh=10^24 cm^-2 (i.e., in the Compton-thick regime). Heavy obscuration has to be common also at larger distances in order to explain the XRB spectral shape around 30 keV. Despite intensive searches, mostly performed in the X-ray band, only a few candidates beyond the nearby Universe have been uncovered thus far. We propose pilot Chandra observations of a well defined sample of seven high-redshift (z=1.8-2.7) sources suspected to host a Compton-thick AGN selected from moderate-depth mid-infrared (Spitzer) observations in the Bootes Field.

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