Journal article
A Catalog of Broad Absorption Line Quasars from the Sloan Digital Sky Survey Early Data Release
The Astronomical journal, v 125(4), pp 1711-1728
02 Jan 2003
Abstract
Astron.J.125:1711,2003 We present a catalog of 224 broad absorption line quasars (BALQSOs) from the
Sloan Digital Sky Survey's Early Data Release Quasar Catalog, including a
relatively complete and homogeneous subsample of 131 BALQSOs. Since the
identification of BALQSOs is subject to considerable systematic uncertainties,
we attempt to create a complete sample of SDSS BALQSOs by combining the results
of two automated selection algorithms and a by-eye classification scheme. One
of these automated algorithms finds broad absorption line troughs by comparison
with a composite quasar spectrum. We present the details of this algorithm and
compare this method to that which uses a power-law fit to the continuum. The
BALQSOs in our sample are further classified as high-ionization BALQSOs
(HiBALs), low-ionization BALQSOs (LoBALs), and BALQSOs with excited iron
absorption features (FeLoBALs); composite spectra of each type are presented.
We further present a study of the properties of the BALQSOs in terms of the
balnicity distribution, which rises with decreasing balnicity. This
distribution of balnicities suggests that the fraction of quasars with
intrinsic outflows may be significantly underestimated.
Metrics
Details
- Title
- A Catalog of Broad Absorption Line Quasars from the Sloan Digital Sky Survey Early Data Release
- Creators
- Timothy A Reichard - Pennsylvania State UniversityGordon T Richards - Pennsylvania State UniversityDonald P Schneider - Pennsylvania State UniversityPatrick B Hall - Pontificia Universidad Católica de ChileAlin Tolea - Johns Hopkins UniversityJulian H Krolik - Johns Hopkins UniversityZlatan Tsvetanov - Johns Hopkins UniversityDaniel E. Vanden Berk - University of PittsburghDonald G York - University of ChicagoG. R Knapp - Princeton UniversityJames E Gunn - Princeton UniversityJ Brinkmann - Apache Corporation
- Publication Details
- The Astronomical journal, v 125(4), pp 1711-1728
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000181713100008
- Scopus ID
- 2-s2.0-0042732245
- Other Identifier
- 991019201371604721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics