Results 51 to 60 of about 16,078 (195)
Polar Outflows in Six Broad Absorption Line Quasars [PDF]
The Astrophysical Journal, 2006 Using the radio observations by FIRST and NVSS, we build a sample of 151 radio variable quasars selected from the Sloan Digital Sky Survey Data Release 3 (SDSS DR3). Six (probably another two) among them are classified as broad absorption line (BAL) quasars, with radio flux variations of a few 10 percent within 1.5-5 years. Such large amplitudes of the
Zhou, Hongyan +5 more
openaire +2 more sources
The Astrophysical JournalThis study presents a detailed investigation of the broad absorption line (BAL) systems in the quasar SDSS J004613.54+010425.7 (hereafter J0046+0104), which makes characters of the simultaneous existence of line-locking and velocity shift signatures ...
Wei-Jian Lu, Ying-Ru Lin
doaj +1 more source
Accurate spectroscopic redshift of the multiply lensed quasar PSOJ0147 from the Pan-STARRS survey
, 2017 Context: The gravitational lensing time delay method provides a one-step determination of the Hubble constant (H0) with an uncertainty level on par with the cosmic distance ladder method.
Lee, Chien-Hsiu
core +1 more source
Discovery of Broad Soft X-ray Absorption Lines from the Quasar Wind in PDS 456 [PDF]
, 2016 High resolution soft X-ray spectroscopy of the prototype accretion disk wind quasar, PDS 456, is presented. Here, the XMM-Newton RGS spectra are analyzed from the large 2013-2014 XMM-Newton campaign, consisting of 5 observations of approximately 100 ks ...
Behar, Ehud +7 more
core +2 more sources
The Astrophysical JournalWe present an analysis of the coordinated velocity shifts observed in multiple C iv and Si iv broad absorption lines (BALs) in the quasar SDSS J113048.45+225206.6.
Wei-Jian Lu, Ying-Ru Lin
doaj +1 more source
Reacceleration of a C iv Broad Absorption Line in Quasar SDSS J083817.00+295526.5
The Astrophysical JournalWe present a rare signature of reacceleration in a C iv broad absorption line (BAL) of the quasar SDSS J083817.00+295526.5. This quasar showcases three distinct BAL systems, labeled as systems A, B, and C.
Ying-Ru Lin, Wei-Jian Lu
doaj +1 more source
Microlensing Constraints on Broad Absorption and Emission Line Flows in the Quasar H1413+117 [PDF]
, 2015 We present new integral field spectroscopy of the gravitationally lensed broad absorption line (BAL) quasar H1413+117, covering the ultraviolet to visible rest-frame spectral range.
Bate, Nicholas F. +4 more
core +2 more sources
Variability in Quasar Broad Absorption Line Outflows
, 2012 5 pages, proceedings for the conference "AGN Winds in Charleston", Charleston, S.C ...
Capellupo, Daniel M. +5 more
openaire +2 more sources
Submillimeter Observations of a Sample of Broad Absorption Line Quasars [PDF]
The Astrophysical Journal, 2003 The broad absorption line (BAL) features seen in a small fraction of quasar optical/UV spectra are attributed to bulk outflows away from the quasar core. Observational evidence suggests that dust plays a key role in these systems, although whether the inferred dust properties are a signature of orientation effects or whether they are indicative of an ...
Lewis, Geraint F. +2 more
openaire +2 more sources
Hubble Space Telescope Ultraviolet Spectroscopy of Fourteen Low-Redshift Quasars [PDF]
, 2006 We present low-resolution ultraviolet spectra of 14 low redshift ...
Ari Laor +38 more
core +4 more sources