Journal article
Broad Absorption Line Quasars in the Sloan Digital Sky Survey with VLA-FIRST Radio Detections
The Astrophysical journal, v 561(2), pp 645-652
23 Feb 2001
Abstract
Astrophys.J. 561 (2001) 645 We present 13 Broad Absorption Line (BAL) quasars, including 12 new objects,
which were identified in the Sloan Digital Sky Survey (SDSS) and matched within
2'' to sources in the FIRST radio survey catalog. The surface density of this
sample of radio-detected BAL quasars is 4.5 +- 1.2 per 100 deg^2, i.e.
approximately 4 times larger than previously found by the shallower FIRST
Bright Quasar Survey (FBQS). A majority of these radio-detected BAL quasars are
moderately radio-loud objects. The fraction of BAL quasars in the entire radio
quasar sample, 4.8 +- 1.3 %, is comparable to the fraction of BAL quasars among
the SDSS optical quasar sample (ignoring selection effects). We estimate that
the true fraction of BAL quasars (mostly HiBALs) in the radio sample is 9.2 +-
2.6 % once selection effects are accounted for. We caution that the absorption
troughs of 4 of the 13 radio-detected quasars considered do not strictly
satisfy the standard BALnicity criterion. One or possibly two of the new
radio-detected BAL quasars are of the rare ``iron LoBAL'' type. BAL quasars are
generally redder than the median SDSS quasar at the same redshift.
Metrics
Details
- Title
- Broad Absorption Line Quasars in the Sloan Digital Sky Survey with VLA-FIRST Radio Detections
- Creators
- Kristen Menou - Princeton UniversityDaniel E. Vanden Berk - FermilabZeljko Ivezic - Princeton UniversityRita S. J Kim - Princeton UniversityGillian R Knapp - Princeton UniversityGordon T Richards - Pennsylvania State UniversityIskra Strateva - Princeton UniversityXiaohui Fan - EarthTech InternationalJames E Gunn - Princeton UniversityPatrick B Hall - Pontificia Universidad Católica de ChileTim HeckmanJulian Krolik - Johns Hopkins UniversityRobert H Lupton - Princeton UniversityDonald P Schneider - Pennsylvania State UniversityDonald G York - University of Chicago
- Publication Details
- The Astrophysical journal, v 561(2), pp 645-652
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000172188800011
- Scopus ID
- 2-s2.0-0035841725
- Other Identifier
- 991019201382304721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics