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Ca II and Na I absorption in the QSO S4 0248 + 430 due to an intervening galaxyObservations of the QSO S4 0248 + 430 and a nearby anonymous galaxy are presented. Two absorption components are found in both Ca II H and K and Na I D1 and D2 at z(a) = 0.0515, 0.0523. Column densities of log N(Ca II) = 13.29, 13.50, and log N(Na I) = 13.79, 14.18 are found for z(a) = 0.0515, 0.0523 absorption systems, respectively. The column density ratios imply considerable calcium depletion and disk-type absorbing gas. At least one and possibly both absorption components are produced by high-velocity gas. A broadband image of the field shows an asymmetrical armlike feature or possible tidal tail covering and extending past the position of the QSO. The presence of this extended feature and the apparent difference between the absorption velocities and galaxy rotation velocity suggest that the absorbing gas is not ordinary disk gas, but rather is a result of tidal disruption.
Document ID
19910033107
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Womble, Donna S.
(California Univ. La Jolla, CA, United States)
Junkkarinen, Vesa T.
(California Univ. La Jolla, CA, United States)
Cohen, Ross D.
(California Univ. La Jolla, CA, United States)
Burbidge, E. Margaret
(California, University La Jolla, United States)
Date Acquired
August 15, 2013
Publication Date
December 1, 1990
Publication Information
Publication: Astronomical Journal
Volume: 100
ISSN: 0004-6256
Subject Category
Astrophysics
Accession Number
91A17730
Funding Number(s)
CONTRACT_GRANT: NAS5-29293
Distribution Limits
Public
Copyright
Other

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