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Mid-infrared spectroscopy of high-redshift obscured quasars

Abstract:

We present mid-infrared observations of 18 sources from a sample of 21 z~2 radio-intermediate obscured quasars. The mid-infrared spectra of the sources are continuum dominated, and 12 sources show deep silicate absorption with tau_9.7~1-2. Combining mid-infrared and optical spectra, we achieve 86% spectroscopic completeness which allows us to confirm that most (63 +14 -22 %) z~2 radio-intermediate quasars are obscured. The new spectra also prove that many high-redshift type-2 quasars do not s...

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Publication status:
Published

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Publisher copy:
10.1086/525245
Journal:
ASTROPHYSICAL JOURNAL More from this journal
Volume:
674
Issue:
2
Pages:
676-685
Publication date:
2007-11-02
DOI:
EISSN:
1538-4357
ISSN:
0004-637X
Keywords:
Pubs id:
pubs:15938
UUID:
uuid:d4946259-24b4-4ce3-ac33-ceb8a8b431d0
Local pid:
pubs:15938
Source identifiers:
15938
Deposit date:
2012-12-19

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