Results 1 to 10 of about 2,405 (218)
Continuum and Emission-Line Properties of Broad Absorption Line Quasars [PDF]
The Astronomical Journal, 2003 35 pages, 11 figures (1 color), 1 table; accepted by ...
Reichard, TA +8 more
openaire +5 more sources
DISCOVERY OF THE TRANSITION OF A MINI-BROAD ABSORPTION LINE INTO A BROAD ABSORPTION LINE IN THE SDSS QUASAR J115122.14+020426.3 [PDF]
Astrophysical Journal, 2013 12 pages, 8 figures, accepted for publication in the Astrophysical ...
Paola Rodríguez Hidalgo +2 more
exaly +4 more sources
Quasar Broad Absorption Line Variability on Multiyear Timescales [PDF]
Astrophysical Journal, 2008 To be published in ...
Robert R Gibson +2 more
exaly +3 more sources
Radio Emission from Broad Absorption Line Quasars
The Astrophysical JournalBroad Absorption Line Quasars (BALQs) generally exhibit significant outflows that may interact with the surrounding medium, resulting in radio emission.
Sina Chen +3 more
doaj +3 more sources
The intrinsic fraction of broad-absorption line quasars [PDF]
Monthly Notices of the Royal Astronomical Society, 2008 We carefully reconsider the problem of classifying broad absorption line quasars (BALQSOs) and derive a new, unbiased estimate of the intrinsic BALQSO fraction from the SDSS DR3 QSO catalogue. We first show that the distribution of objects selected by the so-called ``absorption index'' (AI) is clearly bimodal in log(AI), with only one mode ...
Knigge, Christian +3 more
openaire +3 more sources
The orientation and polarization of broad absorption line quasars★ [PDF]
Monthly Notices of the Royal Astronomical Society, 2012 We present new spectropolarimetric observations of 8 radio-loud broad absorption line (BAL) quasars, and combine these new data with our previous spectropolarimetric atlases (of both radio-loud and radio-quiet objects) in order to investigate the polarization properties of BAL quasars as a group.
DiPompeo, M. A. +2 more
openaire +2 more sources
A Balmer-line Broad Absorption Line Quasar [PDF]
The Astronomical Journal, 2006 I report the discovery of blueshifted broad absorption line (BAL) troughs in at least six transitions of the Balmer series of hydrogen (Hbeta to H9) and in CaII, MgII and excited FeII in the quasar SDSS J125942.80+121312.6. This is only the fourth active galactic nucleus known to exhibit Balmer absorption, all four in conjunction with low-ionization ...
openaire +3 more sources
DESI z ≳ 5 Quasar Survey. I. A First Sample of 400 New Quasars at z ∼ 4.7–6.6
The Astrophysical Journal Supplement Series, 2023 We report the first results of a high-redshift ( z ≳ 5) quasar survey using the Dark Energy Spectroscopic Instrument (DESI). As a DESI secondary target program, this survey is designed to carry out a systematic search and investigation of quasars at 4.8 <
Jinyi Yang +41 more
doaj +1 more source
AChandraSurvey of Broad Absorption Line Quasars [PDF]
The Astrophysical Journal, 2001 12 pages, Latex, emulateapj style, including 3 tables and 3 figures. Accepted May 15, 2001 for publication in ApJ Main Journal. See also http://hea-www.harvard.edu/~pgreen/Papers.html Replaced May 21 since 2 lines were missing from Table ...
Green, Paul J. +4 more
openaire +4 more sources
SPECTROPOLARIMETRY OF RADIO-SELECTED BROAD ABSORPTION LINE QUASARS [PDF]
The Astrophysical Journal Supplement Series, 2010 We report spectropolarimetry of 30 radio-selected broad absorption line (BAL) quasars with the Keck Observatory, 25 from the sample of Becker et al. (2000). Both high and low-ionization BAL quasars are represented, with redshifts ranging from 0.5 to 2.5. The spectropolarimetric properties of radio-selected BAL quasars are very similar to those of radio-
DiPompeo, M. A. +6 more
openaire +2 more sources