Results 31 to 40 of about 382 (184)
The Astrophysical Journal Letters, 2023 We report the discovery of COOL J0335−1927, a quasar at z = 3.27 lensed into three images with a maximum separation of 23.″3 by a galaxy cluster at z = 0.4178. To date, this is the highest redshift wide-separation lensed quasar known.
Kate Napier +20 more
doaj +1 more source
THE VIEWING ANGLES OF BROAD ABSORPTION LINE VERSUS UNABSORBED QUASARS [PDF]
The Astrophysical Journal, 2012 It was recently shown that there is a significant difference in the radio spectral index distributions of broad absorption line (BAL) quasars and unabsorbed quasars, with an overabundance of BAL quasars with steeper radio spectra. This result suggests that source orientation does play into the presence or absence of BAL features.
DiPompeo, Michael A. +2 more
openaire +2 more sources
Dust-driven wind as a model of broad absorption line quasars
Astronomy & Astrophysics, 2023 Context. We test the scenario according to which the broad absorption line (BAL) phenomenon in quasars (QSOs) is not a temporary stage of their life. In this scenario, the BAL effect acts only if the line of sight is within a spatially limited and collimated massive outflow cone covering only a fraction of the sky from the point of view of the nucleus.
Naddaf Moghaddam, Mohammad Hassan +5 more
openaire +3 more sources
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
The Pan-STARRS1 z > 5.6 Quasar Survey. II. Discovery of 55 Quasars at 5.6 < z < 6.5
The Astrophysical Journal Supplement Series, 2023 The identification of bright quasars at z ≳ 6 enables detailed studies of supermassive black holes, massive galaxies, structure formation, and the state of the intergalactic medium within the first billion years after the Big Bang.
Eduardo Bañados +22 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
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
Impact of Radio-mode Feedback on the Covering Fraction of the Circumgalactic Medium of Quasars
The Astrophysical JournalUtilizing data from the Low-Frequency Array Two-meter Sky Survey and the Sloan Digital Sky Survey, we assemble a sample of 1469 projected quasar pairs with detected radio emissions from foreground quasars, as well as a control sample of 5846 pairs ...
Wen-Qiang Liang +4 more
doaj +1 more source
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
Scandinavian Journal of Medicine &Science in Sports, Volume 36, Issue 8, August 2026.ABSTRACT Cross‐sectional studies have indicated impaired neuromuscular and cortical activities following anterior cruciate ligament (ACL) reconstruction. However, adaptations throughout the recovery process remain unclear. Therefore, this study aimed to examine neuromuscular and cortical activity over the first year following ACL reconstruction.
Aglaja Busch, Frank Mayer, Heiner Baur
wiley +1 more source