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Journal articles
The Molecular Gas Content of Z = 3 Lyman Break Galaxies: Evidence of a Non-Evolving Gas Fraction in Main-Sequence Galaxies At Z > 2
G. E. Magdis
1
Emanuele Daddi
2
M. Sargent
2
D. Elbaz
2
R. Gobat
2
H. Dannerbauer
3
C. Feruglio
4
Q. Tan
2
D. Rigopoulou
1, 5
V. Charmandaris
6
M. Dickinson
7
N. Reddy
8
H. Aussel
2
6
IESL
H. Aussel 2
Author
1
Department of Physics (University of Oxford, Keble Road, Oxford OX1 3RH, UK - United Kingdom)
- University of Oxford [Oxford] (Wellington Square, Oxford OX1 2JD - United Kingdom)
2
AIM (UMR_7158 / UMR_E_9005 / UM_112) - Astrophysique Interprétation Modélisation (AIM - UMR 7158 - UMR E 9005,
ex "Astrophysique Interactions Multi-échelles",
Service d'astrophysique,
CEA/Saclay,
Orme des Merisiers
F-91191 GIF SUR YVETTE CEDEX - France)
- CNRS - Centre National de la Recherche Scientifique : UMR_7158 (France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- CEA - Commissariat à l'énergie atomique et aux énergies alternatives : UMR_E_9005 (Centre de Saclay Centre de Grenoble Centre de Cadarache etc - France)
- UPD7 - Université Paris Diderot - Paris 7 : UMR_7158 (5 rue Thomas-Mann - 75205 Paris cedex 13 - France)
3
MPIA - Max-Planck-Institut für Astronomie (Königstuhl 17, 69117 Heidelberg - Germany)
- Max-Planck-Gesellschaft (Jägerstrasse, 10-11, D-10117 Berlin - Germany)
4
IRAM - Institut de RadioAstronomie Millimétrique (300 rue de la Piscine, Domaine Universitaire 38406 Saint Martin d'Hères - France)
- CNRS - Centre National de la Recherche Scientifique : UPS2074 (France)
5
RAL Space - Space Science and Technology Department [Didcot] (Chilton, Didcot OX11 0QX, UK - United Kingdom)
- RAL - STFC Rutherford Appleton Laboratory (Harwell Campus, Didcot OX11 0FA - United Kingdom)
- STFC - Science and Technology Facilities Council (Polaris House, North Star Avenue, Swindon SN2 1SZ - United Kingdom)
6
IESL (IESL/Foundation for Research & Technology-Hellas, GR-71110, Heraklion, Greece - Greece)
- IESL (France)
7
NOAO - National Optical Astronomy Observatory (950 North Cherry Ave.
Tucson, AZ 85719 - United States)
8
Department of Physics and Astronomy [Riverside] (University of California, Riverside 900 University Ave. Riverside, CA 92521 - United States)
- UCR - University of California [Riverside] (900 University Ave. Riverside, CA 92521 - United States)
- University of California (United States)
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 gas) 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 ~2.2 Gyr-1, despite their large infrared luminosities (L IR (2-3) × 1012 L ☉) derived from Herschel. With one plausible CO detection (spurious detection probability of 10-3) and one upper limit, we investigate the evolution of the molecular gas-to-stellar mass ratio (M gas/M *) with redshift. Our data suggest that the steep evolution of M gas/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.
Document type :
Journal articles
Complete list of metadatas
https://hal-cea.archives-ouvertes.fr/cea-00832914
Contributor : Bruno Savelli <>
Submitted on : Tuesday, June 11, 2013 - 3:42:53 PM
Last modification on : Thursday, October 15, 2020 - 3:40:03 PM
Contributor : Bruno Savelli <>
Submitted on : Tuesday, June 11, 2013 - 3:42:53 PM
Last modification on : Thursday, October 15, 2020 - 3:40:03 PM
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Identifiers
- HAL Id : cea-00832914, version 1
- DOI : 10.1088/2041-8205/758/1/L9
Collections
CEA | CNRS | INSU | IRFU-AIM | DSM-IRFU | CEA-DRF | UNIV-PARIS7 | USPC | UNIV-PARIS | UP-SCIENCES
Citation
G. E. Magdis, Emanuele Daddi, M. Sargent, D. Elbaz, R. Gobat, et al.. The Molecular Gas Content of Z = 3 Lyman Break Galaxies: Evidence of a Non-Evolving Gas Fraction in Main-Sequence Galaxies At Z > 2 . Astrophysical Journal Letters, IOP Science, 2012, 758 (1), pp.L9. ⟨10.1088/2041-8205/758/1/L9⟩. ⟨cea-00832914⟩
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