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Evidence for a large fraction of Compton-thick quasars at high redshift

Abstract:

Using mid-infrared and radio selection criteria, we pre-select a sample of candidate high-redshift type-2 quasars in the Subaru XMM-Newton Deep Field (SXDF). To filter out starburst contaminants, we use a bayesian method to fit the spectral energy distributions (SEDs) between 24-microns and B-band, obtain photometric redshifts, and identify the best candidates for high-z type-2 quasars. This leaves us with 12 z_phot >= 1.7 type-2 quasar candidates in an area ~0.8 deg^2, of which only two h...

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Publication status:
Published

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Authors


Martinez-Sansigre, A More by this author
Rawlings, S More by this author
Bonfield, DG More by this author
Simpson, C More by this author
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Journal:
Mon.Not.Roy.Astron.Soc.Lett.
Volume:
379
Issue:
1
Pages:
L6-L10
Publication date:
2006-11-23
DOI:
EISSN:
1745-3933
ISSN:
0035-8711
URN:
uuid:bd585716-04ec-48c0-bfcd-7015e3a9fba4
Source identifiers:
27750
Local pid:
pubs:27750
Keywords:

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