The ALMA Spectroscopic Survey in the Hubble Ultra Deep Field: Constraining the Molecular Content at log(M*/M⊙)?～?9.5 with CO Stacking of MUSE-detected z?～?1.5 Galaxies
文献类型：期刊论文
| 作者 | Inami,Hanae19; Decarli,Roberto20; Walter,Fabian21,22; Weiss,Axel23; Carilli,Chris22,24; Aravena,Manuel25; Boogaard,Leindert26; Gonza?ez-López,Jorge25,27; Popping,Gerg?17; da Cunha,Elisabete1,16,18 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2020-10-01 |
| 卷号 | 902期号:2 |
| ISSN号 | 0004-637X |
| 关键词 | Molecular gas Galaxies Active galaxies Galaxy evolution High-redshift galaxies |
| DOI | 10.3847/1538-4357/abba2f |
| 英文摘要 | Abstract We report molecular gas mass estimates obtained from a stacking analysis of CO line emission in the ALMA Spectroscopic Survey (ASPECS) using the spectroscopic redshifts from the optical integral field spectroscopic survey by the Multi Unit Spectroscopic Explorer (MUSE) of the Hubble Ultra Deep Field (HUDF). Stacking was performed on subsets of the sample of galaxies classified by their stellar mass and position relative to the main-sequence relation (on, above, below). Among all the CO emission lines, from CO(2–1) to CO(6–5), with redshifts accessible via the ASPECS Band?3 and the MUSE data, CO(2–1) provides the strongest constraints on the molecular gas content. We detect CO(2–1) emission in galaxies down to stellar masses of . Below this stellar mass, we present a new constraint on the molecular gas content of main-sequence galaxies by stacking based on the MUSE detections. We find that the molecular gas mass of main-sequence galaxies continuously decreases with stellar mass down to . Assuming a metallicity-based CO–to–H2 conversion factor, the molecular gas-to-stellar mass ratio from to ～10.0 does not seem to decrease as fast as for , which is in line with simulations and studies at lower redshift. The inferred molecular gas density of MUSE-selected galaxies at is comparable with the one derived in the HUDF with a different CO selection. Using the MUSE data we recover most of the CO emission in our deep ALMA observations through stacking, demonstrating the synergy between volumetric surveys obtained at different wave bands. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-902-2-abba2f |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/62184]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Inami,Hanae |
| 作者单位 | 1.Research School of Astronomy and Astrophysics, The Australian National University, Canberra, ACT 2611, Australia 2.Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, D-14482 Potsdam, Germany 3.SKA Organization, Lower Withington, Macclesfield, Cheshire SK11 9DL, UK 4.Department of Astronomy, Cornell University, Space Sciences Building, Ithaca, NY 14853, USA 5.Universit?t Heidelberg, Zentrum für Astronomie, Institut für Theoretische Astrophysik, Albert-Ueberle-Stra?e 2, D-69120 Heidelberg, Germany 6.Institute of Astrophysics, Foundation for Research and Technology–Hellas (FORTH), Heraklion, GR-70013, Greece 7.Chinese Academy of Sciences South America Center for Astronomy (CASSACA), National Astronomical Observatories, CAS, Beijing 100101, People’s Republic of China 8.Laboratoire AIM, CEA/DSM-CNRS-Universite Paris Diderot, Irfu/Service d’Astrophysique, CEA Saclay, Orme des Merisiers, F-91191 Gif-sur-Yvette cedex, France 9.Institut d’astrophysique de Paris, Sorbonne Université, CNRS, UMR 7095, 98 bis bd Arago, F-7014 Paris, France 10.National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA, 22903, USA |
| 推荐引用方式 GB/T 7714 | Inami,Hanae,Decarli,Roberto,Walter,Fabian,等. The ALMA Spectroscopic Survey in the Hubble Ultra Deep Field: Constraining the Molecular Content at log(M*/M⊙)?～?9.5 with CO Stacking of MUSE-detected z?～?1.5 Galaxies[J]. The Astrophysical Journal,2020,902(2). |
| APA | Inami,Hanae.,Decarli,Roberto.,Walter,Fabian.,Weiss,Axel.,Carilli,Chris.,...&Wisotzki,Lutz.(2020).The ALMA Spectroscopic Survey in the Hubble Ultra Deep Field: Constraining the Molecular Content at log(M*/M⊙)?～?9.5 with CO Stacking of MUSE-detected z?～?1.5 Galaxies.The Astrophysical Journal,902(2). |
| MLA | Inami,Hanae,et al."The ALMA Spectroscopic Survey in the Hubble Ultra Deep Field: Constraining the Molecular Content at log(M*/M⊙)?～?9.5 with CO Stacking of MUSE-detected z?～?1.5 Galaxies".The Astrophysical Journal 902.2(2020). |
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