Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/28647
Title: | The ALMA Spectroscopic Survey in the HUDF: Nature and Physical Properties of Gas-mass Selected Galaxies Using MUSE Spectroscopy | Authors: | Boogaard, Leindert A. DECARLI, ROBERTO González-López, Jorge van der Werf, Paul Walter, Fabian Bouwens, Rychard Aravena, Manuel Carilli, Chris Bauer, Franz Erik Brinchmann, Jarle Contini, Thierry Cox, Pierre da Cunha, Elisabete Daddi, Emanuele Díaz-Santos, Tanio Hodge, Jacqueline Inami, Hanae Ivison, Rob Maseda, Michael Matthee, Jorryt Oesch, Pascal Popping, Gergö Riechers, Dominik Schaye, Joop Schouws, Sander Smail, Ian Weiss, Axel Wisotzki, Lutz Bacon, Roland Cortes, Paulo C. Rix, Hans-Walter Somerville, Rachel S. Swinbank, Mark Wagg, Jeff |
Issue Date: | 2019 | Journal: | THE ASTROPHYSICAL JOURNAL | Number: | 882 | Issue: | 2 | First Page: | 140 | Abstract: | We discuss the nature and physical properties of gas-mass selected galaxies in the ALMA spectroscopic survey (ASPECS) of the Hubble Ultra Deep Field (HUDF). We capitalize on the deep optical integral-field spectroscopy from the Multi Unit Spectroscopic Explorer (MUSE) HUDF Survey and multiwavelength data to uniquely associate all 16 line emitters, detected in the ALMA data without preselection, with rotational transitions of carbon monoxide (CO). We identify 10 as CO(2-1) at 1 < z < 2, 5 as CO(3-2) at 2 < z < 3, and 1 as CO(4-3) at z = 3.6. Using the MUSE data as a prior, we identify two additional CO(2-1) emitters, increasing the total sample size to 18. We infer metallicities consistent with (super-)solar for the CO-detected galaxies at z ≤ 1.5, motivating our choice of a Galactic conversion factor between CO luminosity and molecular gas mass for these galaxies. Using deep Chandra imaging of the HUDF, we determine an X-ray AGN fraction of 20% and 60% among the CO emitters at z ∼ 1.4 and z ∼ 2.6, respectively. Being a CO-flux-limited survey, ASPECS-LP detects molecular gas in galaxies on, above, and below the main sequence (MS) at z ∼ 1.4. For stellar masses ≥10<SUP>10</SUP> (10<SUP>10.5</SUP>) {M}<SUB>☉ </SUB>, we detect about 40% (50%) of all galaxies in the HUDF at 1 < z < 2 (2 < z < 3). The combination of ALMA and MUSE integral-field spectroscopy thus enables an unprecedented view of MS galaxies during the peak of galaxy formation. | URI: | http://hdl.handle.net/20.500.12386/28647 | URL: | https://iopscience.iop.org/article/10.3847/1538-4357/ab3102 | ISSN: | 0004-637X | DOI: | 10.3847/1538-4357/ab3102 | Bibcode ADS: | 2019ApJ...882..140B | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Boogaard_2019_ApJ_882_140.pdf | Pdf editoriale | 7.12 MB | Adobe PDF | View/Open |
Page view(s)
44
checked on Sep 18, 2024
Download(s)
18
checked on Sep 18, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.