Low- and high-ionization absorption properties of Mg II absorption-selected galaxies at intermediate redshifts. I. General properties
Christopher W. Churchill,Richard R. Mellon,Jane C. Charlton,Buell T. Jannuzi,Sofia Kirhakos,Charles C. Steidel,Donald P. Schneider +6 more
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In this paper, the metal-line absorption properties for 45 absorption systems that were selected by their Mg II absorption at redshifts between 0.4 and 1.4 were determined.Abstract:
We present extensive metal-line absorption properties for 45 absorption systems that were selected by their Mg II absorption at redshifts between 0.4 and 1.4. For each system the properties of several chemical species are determined, including a wide range of ionization conditions. In the optical, the absorption systems have been observed at ~6 km s-1 resolution with HIRES/Keck, which covered Mg II, several Fe II transitions, Mg I, and in some cases (depending upon redshift) Ca II, Ti II, Mn II, and Al III. Ultraviolet, lower resolution (~230 km s-1) Faint Object Spectrograph data (1600-3275 ?) were obtained from the Hubble Space Telescope archive. These spectra covered Al II, Al III, Si II, Si III, Si IV, C II, C III, C IV, N V, O VI, and several Lyman series transitions, with coverage dependent upon the absorption system redshift. From these data, we infer that Mg II-absorbing galaxies at intermediate redshifts have multiphase gaseous structures.read more
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Further evidence for a variable fine‐structure constant from Keck/HIRES QSO absorption spectra
TL;DR: In this paper, a detailed many-multiplet analysis of a third Keck/HIRES sample containing 78 absorption systems was presented, providing a total of 128 absorption systems over the redshift range 0.2 < zabs < 3.7.
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Damped Lyα Systems at z < 1.65: The Expanded Sloan Digital Sky Survey Hubble Space Telescope Sample
TL;DR: In this paper, the authors present results of the Cycle 11 survey for low-redshift (z 0.5 to 0.6 ) and show that the mean H I column density of Mg II systems with 0.3 is nDLA(z) = n0(1 + z), where n0 = 0.044? 0.005 and? = 1.1?.
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METALLICITY EVOLUTION OF DAMPED Lyα SYSTEMS OUT TO z ∼ 5
TL;DR: In this article, chemical abundance measurements for 47 damped Lyα (DLA) systems, 30 at z > 4, observed with the Echellette Spectrograph and Imager and the High Resolution Echelle Spectrometer on the Keck telescopes are presented.
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EVIDENCE FOR UBIQUITOUS COLLIMATED GALACTIC-SCALE OUTFLOWS ALONG THE STAR-FORMING SEQUENCE AT z ∼ 0.5
Kate H. R. Rubin,Kate H. R. Rubin,J. Xavier Prochaska,J. Xavier Prochaska,David C. Koo,Andrew C. Phillips,Crystal L. Martin,L. Winstrom +7 more
TL;DR: In this paper, the authors analyzed Mg II λλ2796, 2803 and Fe II −λ2586, 2600 absorption profiles in individual spectra of 105 galaxies at 0.3 50° (edge-on) and found that biconical outflows are ubiquitous in normal, star-forming galaxies at z ~ 0.5.
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The Age-Metallicity Relation of the Universe in Neutral Gas: The First 100 Damped Lyα Systems
Jason X. Prochaska,Jason X. Prochaska,Eric Gawiser,Arthur M. Wolfe,Arthur M. Wolfe,Sandra Castro,S. G. Djorgovski +6 more
TL;DR: In this article, accurate metallicity measurements for 125 damped Lyα (DLA) systems at 0.5 < z < 5, including ≈ 50 new measurements from our recently published Echellette Spectrograph and Imager surveys are discussed.
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