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• W3100858230 endingPage "83" @default.
• W3100858230 startingPage "83" @default.
• W3100858230 abstract "Absorption spectroscopy of gravitationally lensed quasars (GLQs) enables study of spatial variations in the interstellar and/or circumgalactic medium of foreground galaxies. We report observations of 4 GLQs, each with two images separated by 0.8-3.0, that show strong absorbers at redshifts 0.4$<$$z_{abs}$$<$1.3 in their spectra, including some at the lens redshift with impact parameters 1.5-6.9 kpc. We measure H I Lyman lines along two sight lines each in five absorbers (10 sight lines in total) using HST STIS, and metal lines using Magellan Echellette or Sloan Digital Sky Survey. Our data have doubled the lens galaxy sample with measurements of H I column densities ($N_{rm H I}$) and metal abundances along multiple sight lines. Our data, combined with the literature, show no strong correlation between absolute values of differences in $N_{rm H I}$, $N_{rm Fe II}$, or [Fe/H] and the sight line separations at the absorber redshifts for separations of 0-8 kpc. The estimated abundance gradients show a tentative anti-correlation with abundances at galaxy centers. Some lens galaxies show inverted gradients, possibly suggesting central dilution by mergers or infall of metal-poor gas. [Fe/H] measurements and masses estimated from GLQ astrometry suggest the lens galaxies lie below the total mass-metallicity relation for early-type galaxies as well as measurements for quasar-galaxy pairs and gravitationally lensed galaxies at comparable redshifts. This difference may arise in part from the dust depletion of Fe. Higher resolution measurements of H and metals (especially undepleted elements) for more GLQ absorbers and accurate lens redshifts are needed to confirm these trends." @default.
• W3100858230 created "2020-11-23" @default.
• W3100858230 creator A5024676282 @default.
• W3100858230 creator A5042374450 @default.
• W3100858230 creator A5050899913 @default.
• W3100858230 creator A5060679701 @default.
• W3100858230 creator A5065148192 @default.
• W3100858230 creator A5071059947 @default.
• W3100858230 date "2019-11-22" @default.
• W3100858230 modified "2023-10-18" @default.
• W3100858230 title "Probing Structure in Cold Gas at <i>z</i> ≲ 1 with Gravitationally Lensed Quasar Sight Lines" @default.
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