Results 11 to 20 of about 1,319 (176)
The Astrophysical Journal, 2002 A Keck echelle spectrum of the quasar FBQS 0840+3633 reveals outflowing gas that gives rise to blueshifted absorption lines of many low-ionization species. The gas covers a range of velocities from -700 to -3500 km s-1, with two main components centered at -900 and -2800 km s-1.
Martijn de Kool +4 more
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An Extremely Metal-poor Lyα Emitter Candidate at z = 6 Revealed through Absorption Spectroscopy [PDF]
The Astrophysical Journal LettersWe report the discovery of a Ly α emitter (LAE) candidate in the immediate foreground of the quasar PSO J158-14 at z _QSO = 6.0685 at a projected distance ∼29 pkpc that is associated with an extremely metal-poor absorption system.
Dominika Ďurovčíková +12 more
doaj +2 more sources
Galactic-scale Emission-line Outflow from the Radio-loud Quasar 3C 191 [PDF]
The Astrophysical Journal Supplement SeriesQuasar feedback is routinely invoked as an indispensable ingredient in galaxy formation models. Galactic outflows are a crucial agent of quasar feedback that frequently manifest themselves in absorption and emission lines.
Qinyuan Zhao +8 more
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The Astrophysical Journal Supplement Series, 1996 Todd M. Tripp, Limin Lu, Blair D. Savage
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The Astrophysical JournalLinking nuclear winds to galactic-scale outflows remains a major observational challenge in understanding the multiscale physics of active galactic nucleus feedback.
Mayank Sharma +6 more
doaj +2 more sources
Detecting and Characterizing Mg ii Absorption in DESI Survey Validation Quasar Spectra [PDF]
Astronomical Journal, 2023 We present findings of the detection of Magnesium II (Mg ii, λ = 2796, 2803 Å) absorbers from the early data release of the Dark Energy Spectroscopic Instrument (DESI).
L. Napolitano +35 more
semanticscholar +1 more source
Reference wavelengths of Si ii, C ii, Fe i, and Ni ii for quasar absorption spectroscopy [PDF]
Monthly notices of the Royal Astronomical Society, 2020 Wavelengths of absorption lines in the spectra of galaxies along the line of sight to distant quasars can be used to probe the variablility of the fine structure constant, α, at high redshifts, provided that the laboratory wavelengths are known to better
G. Nave, C. Clear
semanticscholar +1 more source
Neutral-gas-phase metal abundances in Zn ii-selected quasar absorption line systems near redshift z = 1.2★ [PDF]
Monthly notices of the Royal Astronomical Society, 2018 We present ten metallicity measurements for quasar absorbers near $z=1.2$ that were selected for having unusually significant ZnII absorption in their SDSS spectra.
E. Monier +4 more
semanticscholar +1 more source
Near-infrared spectroscopy of extreme BAL QSOs from the QUBRICS bright quasar survey [PDF]
, 2021 We report on the spectral confirmation of 18 QSO candidates from the"QUasars as BRIght beacons for Cosmology in the Southern hemisphere'' survey (QUBRICS), previously observed in the optical band, for which we acquired new spectroscopic data in the near ...
G. Cupani +10 more
semanticscholar +1 more source
Associated Absorption Lines in the Radio‐loud Quasar 3C 351: Far‐Ultraviolet Echelle Spectroscopy from theHubble Space Telescope [PDF]
The Astrophysical Journal, 2002 As one of the most luminous radio-loud quasars showing intrinsic ultraviolet (UV) and X-ray absorption, 3C 351 provides a laboratory for studying the kinematics and physical conditions of such ionized absorbers. We present an analysis of the intrinsic absorption lines in the high-resolution ($\sim$ 7 km/s) far-UV spectrum which was obtained from ...
Yuan, Q. +5 more
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