A Comparison of the Stellar, CO, and Dust-continuum Emission from Three Star-forming HUDF Galaxies at z?~?2
Kaasinen,Melanie1,2,3; Walter,Fabian1; Novak,Mladen1; Neeleman,Marcel1; Smail,Ian4; Boogaard,Leindert5; Cunha,Elisabete da3,6,7; Weiss,Axel8; Liu,Daizhong1; Decarli,Roberto9; Popping,Gerg?10; Diaz-Santos,Tanio11,12,13; Cortés,Paulo14,15; Aravena,Manuel11; Werf,Paul van der5; Riechers,Dominik1,16; Inami,Hanae17; Hodge,Jacqueline A.5; Rix,Hans-Walter1; Cox,Pierre18
Source PublicationThe Astrophysical Journal
AbstractAbstract We compare the extent of the dust, molecular gas, and stars in three star-forming galaxies, at z?=?1.4, 1.6, and 2.7, selected from the Hubble Ultra Deep Field based on their bright carbon monoxide (CO) and dust-continuum emission as well as their large rest-frame optical sizes. The galaxies have high stellar masses, , and reside on, or slightly below, the main sequence of star-forming galaxies at their respective redshifts. We probe the dust and molecular gas using subarcsecond Atacama Large Millimeter/submillimeter Array observations of the 1.3 mm continuum and CO line emission, respectively, and probe the stellar distribution using Hubble Space Telescope observations at 1.6 μm. We find that for all three galaxies the CO emission appears ?30% more compact than the stellar emission. For the z?=?1.4 and 2.7 galaxies, the dust emission is also more compact, by ?50%, than the stellar emission, whereas for the z?=?1.6 galaxy, the dust and stellar emission have similar spatial extents. This similar spatial extent is consistent with observations of local disk galaxies. However, most high-redshift observations show more compact dust emission, likely because of the ubiquity of central starbursts at high redshift and the limited sensitivity of many of these observations. Using the CO emission line, we also investigate the kinematics of the cold interstellar medium in the galaxies, and find that all three have kinematics consistent with a rotation-dominated disk.
KeywordHigh-redshift galaxies Interstellar medium Dust continuum emission Galaxy evolution Molecular gas
WOS IDIOP:0004-637X-899-1-aba438
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.Max-Planck-Institut für Astronomie, K?nigstuhl 17, D-69117 Heidelberg, Germany;
2.Universit?t Heidelberg, Zentrum für Astronomie, Institut für Theoretische Astrophysik, Albert-Ueberle-Stra?e 2, D-69120 Heidelberg, Germany
3.ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), Australia
4.Centre for Extragalactic Astronomy, Department of Physics, Durham University, Durham DH1 3LE, UK
5.Leiden Observatory, Leiden University, P.O. Box 9513, NL-2300 RA Leiden, The Netherlands
6.International Centre for Radio Astronomy Research, University of Western Australia, 35 Stirling Hwy, Crawley, WA 6009, Australia
7.Research School of Astronomy and Astrophysics, The Australian National University, Canberra, ACT 2611, Australia
8.Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
9.INAF—Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, via Gobetti 93/3, I-40129, Bologna, Italy
10.European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748, Garching, Germany
11.Núcleo de Astronomía, Facultad de Ingeniería y Ciencias, Universidad Diego Portales, Ejército Libertador 441, Santiago 8320000, Chile
12.Institute of Astrophysics, Foundation for Research and Technology-Hellas (FORTH), Heraklion, GR-70013, Greece
13.Chinese Academy of Sciences South America Center for Astronomy (CASSACA), National Astronomical Observatories, CAS, Beijing 100101, People’s Republic of China
14.Joint ALMA Observatory—ESO, Av. Alonso de Córdova, 3107, Santiago, Chile
15.National Radio Astronomy Observatory, 520 Edgemont Rd, Charlottesville, VA, 22903, USA
16.Department of Astronomy, Cornell University, Space Sciences Building, Ithaca, NY 14853, USA
17.Hiroshima Astrophysical Science Center, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
18.Institut dastrophysique de Paris, Sorbonne Université, CNRS, UMR 7095, 98 bis bd Arago, F-7014 Paris, France
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Kaasinen,Melanie,Walter,Fabian,Novak,Mladen,等. A Comparison of the Stellar, CO, and Dust-continuum Emission from Three Star-forming HUDF Galaxies at z?~?2[J]. The Astrophysical Journal,2020,899(1).
APA Kaasinen,Melanie.,Walter,Fabian.,Novak,Mladen.,Neeleman,Marcel.,Smail,Ian.,...&Cox,Pierre.(2020).A Comparison of the Stellar, CO, and Dust-continuum Emission from Three Star-forming HUDF Galaxies at z?~?2.The Astrophysical Journal,899(1).
MLA Kaasinen,Melanie,et al."A Comparison of the Stellar, CO, and Dust-continuum Emission from Three Star-forming HUDF Galaxies at z?~?2".The Astrophysical Journal 899.1(2020).
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