Results 61 to 70 of about 16,078 (195)
OUTFLOW AND HOT DUST EMISSION IN BROAD ABSORPTION LINE QUASARS [PDF]
The Astrophysical Journal, 2014 16 pages, 10 figures, 2 tables; Accepted for publication in The Astrophysical ...
Zhang, Shaohua +6 more
openaire +2 more sources
AGN Feedback Efficiency of Narrow Absorption Line Quasars
The Astrophysical JournalWe consider if outflowing winds that are detected via narrow absorption lines (NALs) with FWHM of
Toru Misawa +2 more
doaj +1 more source
Outlier Detection in the DESI Bright Galaxy Survey
The Astrophysical Journal Letters, 2023 We present an unsupervised search for outliers in the Bright Galaxy Survey (BGS) data set from the DESI Early Data Release. This analysis utilizes an autoencoder to compress galaxy spectra into a compact, redshift-invariant latent space, and a ...
Yan Liang +5 more
doaj +1 more source
A simple disc wind model for broad absorption line quasars [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 Approximately 20% of quasi-stellar objects (QSOs) exhibit broad, blue-shifted absorption lines in their ultraviolet spectra. Such features provide clear evidence for significant outflows from these systems, most likely in the form of accretion disk winds.
Higginbottom, N. +4 more
openaire +5 more sources
, 2002 In an ongoing infrared imaging survey of quasars at Keck Observatory, we have discovered that the z=1.285 quasar SDSS J233646.2-010732.6 comprises two point sources with a separation of 1.67". Resolved spectra show that one component is a standard quasar
Becker, Robert H. +5 more
core +1 more source
GMRT detection of HI 21 cm associated absorption towards the z=1.2 red quasar 3C 190 [PDF]
, 2003 We report the GMRT detection of associated HI 21 cm-line absorption in the z=1.1946 red quasar 3C 190. Most of the absorption is blue-shifted with respect to the systemic redshift.
A. Stockton +23 more
core +3 more sources
The Astrophysical JournalWe present the multiwavelength spectral energy distributions (SEDs) for 65 luminous broad absorption line (BAL) quasars with redshifts 1.55 ≲ z ≲ 3.50 from the Gemini Near Infrared Spectrograph–Distant Quasar Survey (GNIRS-DQS).
Harum Ahmed +6 more
doaj +1 more source
The compact structure of radio-loud broad absorption line quasars [PDF]
Monthly Notices of the Royal Astronomical Society, 2008 16 pages, 3 figures, 4 tables; accepted for publication in ...
Liu, Y. +3 more
openaire +2 more sources
The Astrophysical JournalWe present the results of an investigation of a highly variable C iv broad absorption line (BAL) feature in spectra of the quasar SBS 1408+544 ( z = 2.337) that shows a significant shift in velocity over time.
Robert Wheatley +22 more
doaj +1 more source
A catalogue of absorption-line systems in QSO spectra
, 2003 We present a new catalog of absprption-line systems identified in the quasar spectra. It contains data on 821 QSOs and 8558 absorption systems comprizing 16139 absorption lines with measured redshifts in the QSO spectra.
A. D. Kaminker +16 more
core +1 more source