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A spectroscopic study of damped Lyman-alpha systems in the Las Campanas/Palomar surveyThe present intermediate-resolution spectra of nine QSOs contain 15 candidate damped Ly-alpha absorption features which are part of a sample of candidate damped Ly-alpha absorption lines. Ten of the 15 candidates are confirmed to have these features; eight of the ten have neutral hydrogen column density greater than 2 x 10 exp 20/sq cm. A simple curve-of-growth analysis is conducted for seven of the ten confirmed Ly-alpha systems, in order to characterize the kinematics of the absorbing gas; the deduced velocity dispersion, which is too large to be compatible with the simple velocity structure indicated by the 21-cm absorption data, is interpreted as grounds for a two-phase model encompassing a quiescent H I gas and a turbulent gas that dominates the equivalent widths of associated metal lines.
Document ID
19930037279
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Lu, Limin
(Wisconsin Univ. Madison; California Univ., La Jolla; Pittsburgh Univ., PA, United States)
Wolfe, Arthur M.
(California Univ. La Jolla, United States)
Turnshek, David A.
(Pittsburgh Univ. PA, United States)
Lanzetta, Kenneth M.
(California Univ. La Jolla, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Astrophysical Journal Supplement Series
Volume: 84
Issue: 1
ISSN: 0067-0049
Subject Category
Astrophysics
Accession Number
93A21276
Funding Number(s)
CONTRACT_GRANT: NSF AST-89-15070
CONTRACT_GRANT: NAGW-2119
CONTRACT_GRANT: NAS5-26555
Distribution Limits
Public
Copyright
Other

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