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Large-scale structure traced by molecular gas at high redshift

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Stanway, Elizabeth R., Bremer, M. N. (Malcolm N.), Davies, Luke J. M., Birkinshaw, M., Douglas, L. S. and Lehnert, M. D. (Matthew D.) (2008) Large-scale structure traced by molecular gas at high redshift. The Astrophysical Journal, Vol.687 (No.1). L1-L4. doi:10.1086/593976

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Official URL: http://dx.doi.org/10.1086/593061

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Abstract

We present observations of redshifted CO(1-0) and CO(2-1) in a field containing an overdensity of Lyman break galaxies (LBGs) at . Our Australia Telescope Compact Array observations were centered between two spectroscopically confirmed galaxies. We place upper limits on the molecular gas masses in these two galaxies of M(H2) < 1.7 × 1010 and <2.9 × 109 M (2 σ), comparable to their stellar masses. We detect an optically faint line emitter situated between the two LBGs which we identify as warm molecular gas at . This source, detected in the CO(2-1) transition but undetected in CO(1-0), has an integrated line flux of Jy km s−1 , yielding an inferred gas mass M(H2) = M . Molecular line emitters without detectable counterparts at optical and infrared wavelengths may be crucial tracers of structure and mass at high redshift.

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Red shift, Galaxies -- Evolution
Journal or Publication Title: The Astrophysical Journal
Publisher: Institute of Physics Publishing, Inc.
ISSN: 0004-637X
Official Date: 2008
Dates:
DateEvent
2008Published
Volume: Vol.687
Number: No.1
Page Range: L1-L4
DOI: 10.1086/593976
Status: Peer Reviewed
Publication Status: Published
Funder: Science and Technology Facilities Council (Great Britain) (STFC)

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