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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/10918333
Record Status
Checked
Record Id
10918333
Title
The molecular gas content of z = 3 lyman break galaxies: Evidence of a non-evolving gas fraction in main-sequence galaxies at z > 2
Contributors
G Magdis
,
D Rigopoulou (STFC Rutherford Appleton Lab.)
,
E Daddi
,
M Sargent
,
D Elbaz
,
R Gobat
,
Q Tan
,
H Aussel
,
H Dannerbauer
,
C Feruglio
,
V Charmandaris
,
M Dickinson
,
N Reddy
Abstract
We present observations of the CO[J = 3 ? 2] emission toward two massive and infrared luminous Lyman break galaxies (LBGs) at z = 3.21 and z = 2.92, using the IRAM Plateau de Bure Interferometer, placing first constraints on the molecular gas masses (M ) of non-lensed LBGs. Their overall properties are consistent with those of typical (main-sequence) galaxies at their redshifts, with specific star formation rates 1.6 and 2.2Gyr , despite their large infrared luminosities (L (2-3) × 10 L) derived from Herschel. With one plausible CO detection (spurious detection probability of 10 ) and one upper limit, we investigate the evolution of the molecular gas-to-stellar mass ratio (M /M ) with redshift. Our data suggest that the steep evolution of M /M of normal galaxies up to z 2 is followed by a flattening at higher redshifts, providing supporting evidence for the existence of a plateau in the evolution of the specific star formation rate at z > 2.5. © 2012. The American Astronomical Society. All rights reserved.
Organisation
STFC
,
RALSP
,
RALSP - SPD
Keywords
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Language
English (EN)
Type
Details
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Year
Journal Article
Astrophys J Lett
758, no. 1 (2012): L9.
doi:10.1088/2041-8205/758/1/L9
2012
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