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The ALMA Spectroscopic Survey in the HUDF: Nature and Physical Properties of Gas-mass Selected Galaxies Using MUSE Spectroscopy

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

The ALMA Spectroscopic Survey in the HUDF: Nature and Physical Properties of Gas-mass Selected Galaxies Using MUSE Spectroscopy Thumbnail


Authors

Leindert A. Boogaard

Roberto Decarli

Jorge González-López

Paul van der Werf

Fabian Walter

Rychard Bouwens

Manuel Aravena

Chris Carilli

Franz Erik Bauer

Jarle Brinchmann

Thierry Contini

Pierre Cox

Elisabete da Cunha

Emanuele Daddi

Tanio Díaz-Santos

Jacqueline Hodge

Hanae Inami

Rob Ivison

Michael Maseda

Jorryt Matthee

Pascal Oesch

Gergö Popping

Dominik Riechers

Joop Schaye

Sander Schouws

Axel Weiss

Lutz Wisotzki

Roland Bacon

Paulo C. Cortes

Hans-Walter Rix

Rachel S. Somerville

Jeff Wagg



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 …1010 (1010.5) M, 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.

Citation

Boogaard, L. A., Decarli, R., González-López, J., van der Werf, P., Walter, F., Bouwens, R., …Wagg, J. (2019). The ALMA Spectroscopic Survey in the HUDF: Nature and Physical Properties of Gas-mass Selected Galaxies Using MUSE Spectroscopy. Astrophysical Journal, 882(2), https://doi.org/10.3847/1538-4357/ab3102

Journal Article Type Article
Acceptance Date Apr 12, 2019
Online Publication Date Sep 11, 2019
Publication Date Sep 10, 2019
Deposit Date Oct 8, 2019
Publicly Available Date Oct 8, 2019
Journal Astrophysical Journal
Print ISSN 0004-637X
Publisher American Astronomical Society
Peer Reviewed Peer Reviewed
Volume 882
Issue 2
DOI https://doi.org/10.3847/1538-4357/ab3102
Public URL https://durham-repository.worktribe.com/output/1289230

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Copyright Statement
© 2019. The American Astronomical Society. All rights reserved.






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