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

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

doi:10.1086/320690

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

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

Astronomy & Astrophysics

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Abstract

We present two low-resolution (R ∼ 1300) high signal-to-noise ratio spectra (W_r,lim ≈ 50 mÅ) of the quasar CSO 118 (z_em = 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 ≲ z_abs ≲ 2.97, seven of which are z_abs ≳ 2.68. In the redshift range covered by the seven z_abs ≳ 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 language	English (US)
Pages (from-to)	L101-L104
Journal	Astrophysical Journal
Volume	553
Issue number	2 PART 2
DOIs	https://doi.org/10.1086/320690
State	Published - Jun 1 2001

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/320690

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

abstract = "We present two low-resolution (R ∼ 1300) high signal-to-noise ratio spectra (Wr,lim ≈ 50 m{\AA}) 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.",

author = "Rajib Ganguly and Charlton, {Jane C.} and Bond, {Nicholas A.}",

note = "Funding Information: 2IRAF is distributed by the National Optical Astronomy Observatories, which are operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with the National Science Foundation. Funding Information: Support for this work was provided by the NSF (AST-9617185) and NASA (NAG5-6399). We would like to thank Gary Hill for building the LRS and Larry Ramsey for the building the Hobby–Eberly Telescope. RG acknowledges Gordon Richards for useful discussions.",

year = "2001",

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doi = "10.1086/320690",

language = "English (US)",

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pages = "L101--L104",

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T1 - The absorbers toward CSO 118

T2 - Superclustering at z ∼ 3, or an intrinsic absorption complex?

AU - Ganguly, Rajib

AU - Charlton, Jane C.

AU - Bond, Nicholas A.

N1 - Funding Information: 2IRAF is distributed by the National Optical Astronomy Observatories, which are operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with the National Science Foundation. Funding Information: Support for this work was provided by the NSF (AST-9617185) and NASA (NAG5-6399). We would like to thank Gary Hill for building the LRS and Larry Ramsey for the building the Hobby–Eberly Telescope. RG acknowledges Gordon Richards for useful discussions.

PY - 2001/6/1

Y1 - 2001/6/1

N2 - 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.

AB - 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.

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DO - 10.1086/320690

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SP - L101-L104

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 PART 2

ER -

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

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