A DEEP SEARCH FOR MOLECULAR GAS IN TWO MASSIVE LYMAN BREAK GALAXIES AT z=3 AND 4: VANISHING CO-EMISSION DUE TO LOW METALLICITY?
文献类型：期刊论文
| 作者 | 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 |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2013-10-20 |
| 卷号 | 776期号:2页码:L24(6PP) |
| 关键词 | galaxies: evolution galaxies: high-redshift galaxies: star formation |
| ISSN号 | 2041-8205 |
| 通讯作者 | Tan, Q (通讯作者) Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China. |
| 英文摘要 | We 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. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | STAR-FORMING GALAXIES ; SUBMILLIMETER GALAXIES ; LUMINOSITY FUNCTIONS ; SCALING RELATIONS ; CONVERSION FACTOR ; STELLAR ; Z=4.05 ; Z-SIMILAR-TO-2 ; STARBURSTS ; EVOLUTION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000325490200007 |
| 公开日期 | 2014-01-08 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/9789]  |
| 专题 | 紫金山天文台_暗物质和空间天文实验室 |
| 作者单位 | 1.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 |
| 推荐引用方式 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). |
入库方式： OAI收割
来源：紫金山天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。