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Title:
The Absorbers toward CSO 118: Superclustering at Z~3, or an Intrinsic Absorption Complex?
Authors:
Ganguly, Rajib; Charlton, Jane C.; Bond, Nicholas A.
Affiliation:
AA(Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802 ), AB(Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802 ), AC(Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802 )
Publication:
The Astrophysical Journal, Volume 553, Issue 2, pp. L101-L104. (ApJL Homepage)
Publication Date:
06/2001
Origin:
UCP
Astronomy Keywords:
Galaxies: Quasars: Absorption Lines, quasars: individual (CSO 118)
DOI:
10.1086/320690
Bibliographic Code:
2001ApJ...553L.101G

Abstract

We present two low-resolution (R~1300) high signal-to-noise ratio spectra (Wr,lim~50 mÅ) of the quasar CSO 118 (zem=2.97) taken with the Hobby-Eberly Telescope Marcario Low-Resolution Spectrograph. We detect eight absorbers selected by the C IV λλ1548, 1550 absorption doublet in the redshift range 2.23<~zabs<~2.97, seven of which are zabs>~2.68. In the redshift range covered by the seven zabs>~2.68 systems, one expects to find two absorbers. We discuss possible explanations for such an excess of absorbers in a small velocity range. Only superclustering at high redshift and absorption due to intrinsic gas are feasibly allowed. Based on observations obtained with the Hobby-Eberly Telescope, which is a joint project of the University of Texas at Austin, Pennsylvania State University, Stanford University, Ludwig-Maximillians-Universität München, and Georg-August-Universität Göttingen.
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