The absorbers toward CSO 118: Superclustering at z ∼ 3, or an intrinsic absorption complex?

Rajib Ganguly, Jane C. Charlton, Nicholas A. Bond

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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.

Original languageEnglish (US)
Pages (from-to)L101-L104
JournalAstrophysical Journal
Volume553
Issue number2 PART 2
DOIs
StatePublished - Jun 1 2001

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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