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A DEEP SEARCH FOR MOLECULAR GAS IN TWO MASSIVE LYMAN BREAK GALAXIES AT z=3 AND 4: VANISHING CO-EMISSION DUE TO LOW METALLICITY?
Tan, Q.1,2,3,4; Daddi, E.3; Sargent, M.3; Magdis, G.5; Hodge, J.6; Bethermin, M.3; Bournaud, F.3; Carilli, C.7; Dannerbauer, H.8; Dickinson, M.9; Elbaz, D.3; Gao, Y.1,2; Morrison, G.10,11; Owen, F.7; Pannella, M.3; Riechers, D.12; Walter, F.6
2013-10-20
Source PublicationASTROPHYSICAL JOURNAL LETTERS
ISSN2041-8205
Volume776Issue:2Pages:L24(6PP)
Corresponding AuthorTan, Q (通讯作者) Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China.
AbstractWe present deep IRAM Plateau de Bure Interferometer observations, searching for CO-emission toward two massive, non-lensed Lyman break galaxies at z = 3.216 and 4.058. With one low significance CO detection (3.5 sigma) and one sensitive upper limit, we find that the CO lines are greater than or similar to 3-4 times weaker than expected based on the relation between IR and CO luminosities followed by similarly massive galaxies at z = 0-2.5. This is consistent with a scenario in which these galaxies have low metallicity, causing an increased CO-to-H-2 conversion factor, i.e., weaker CO-emission for a given molecular (H-2) mass. The required metallicities at z > 3 are lower than predicted by the fundamental metallicity relation at these redshifts, consistent with independent evidence. Unless our galaxies are atypical in this respect, detecting molecular gas in normal galaxies at z > 3 may thus remain challenging even with ALMA.
KeywordGalaxies: Evolution Galaxies: High-redshift Galaxies: Star Formation
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/2041-8205/776/2/L24
WOS KeywordSTAR-FORMING GALAXIES ; SUBMILLIMETER GALAXIES ; LUMINOSITY FUNCTIONS ; SCALING RELATIONS ; CONVERSION FACTOR ; STELLAR ; Z=4.05 ; Z-SIMILAR-TO-2 ; STARBURSTS ; EVOLUTION
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000325490200007
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/9789
Collection暗物质和空间天文实验室
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
3.CEA Saclay, DSM, Irfu, Serv Astrophys, F-91191 Gif Sur Yvette, France
4.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
5.Univ Oxford, Dept Phys, Oxford OX1 3RH, England
6.Max Planck Inst Astron, D-69117 Heidelberg, Germany
7.Natl Radio Astron Observ, Socorro, NM 87801 USA
8.Univ Vienna, Inst Astron, A-1160 Vienna, Austria
9.Natl Opt Astron Observ, Tucson, AZ 85719 USA
10.Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA
11.Canada France Hawaii Telescope Corp, Kamuela, HI 96743 USA
12.Cornell Univ, Dept Astron, Ithaca, NY 14853 USA
Recommended Citation
GB/T 7714
Tan, Q.,Daddi, E.,Sargent, M.,et al. A DEEP SEARCH FOR MOLECULAR GAS IN TWO MASSIVE LYMAN BREAK GALAXIES AT z=3 AND 4: VANISHING CO-EMISSION DUE TO LOW METALLICITY?[J]. ASTROPHYSICAL JOURNAL LETTERS,2013,776(2):L24(6PP).
APA Tan, Q..,Daddi, E..,Sargent, M..,Magdis, G..,Hodge, J..,...&Walter, F..(2013).A DEEP SEARCH FOR MOLECULAR GAS IN TWO MASSIVE LYMAN BREAK GALAXIES AT z=3 AND 4: VANISHING CO-EMISSION DUE TO LOW METALLICITY?.ASTROPHYSICAL JOURNAL LETTERS,776(2),L24(6PP).
MLA Tan, Q.,et al."A DEEP SEARCH FOR MOLECULAR GAS IN TWO MASSIVE LYMAN BREAK GALAXIES AT z=3 AND 4: VANISHING CO-EMISSION DUE TO LOW METALLICITY?".ASTROPHYSICAL JOURNAL LETTERS 776.2(2013):L24(6PP).
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