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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
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

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