New Damped Lya Metallicities from ESI Spectroscopy of Five Palomar Sky Survey Quasars

Details New Damped Lya Metallicities from ESI Spectroscopy of Five Palomar Sky Survey Quasars New Damped Lya Metallicities from ESI Spectroscopy of Five Palomar Sky Survey Quasars

2003-05-16

arxiv.org/abs/astro-ph/0305313v1

Astronomy and Astrophysics

Astrophysics

14 pages, 20 figures. Accepted to ApJS, May 9, 2003

Scientific paper

10.1086/376793

This paper presents chemical abundance measurements for 12 new z>3 damped Lya systems discovered toward five quasars from the Palomar Sky Survey. We determine HI column densities from profile fits to the observed damped Lya profiles and measure ionic column densities and limits for all observed metal-line transitions. This dataset, acquired with the Echellette Spectrograph and Imager on the KeckII telescope, adds to the rapidly growing database of damped Lya abundances. It will impact studies of chemical evolution in the early universe and help identify candidates for detailed follow-up observations with echelle spectrographs. We report the discovery of the first quasar sightline with four cosmologically distinct damped Lya systems.

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