On the Transition of the Galaxy Quenching Mode at 0.5?
Liu,F. S.1,2; Jia,Meng1; Yesuf,Hassen M.2; Faber,S. M.2; Koo,David C.2; Guo,Yicheng3; Bell,Eric F.4; Jiang,Dongfei1; Wang,Weichen5; Koekemoer,Anton M.6; Zheng,Xianzhong7; Fang,Jerome J.8; Barro,Guillermo9; Pérez-González,Pablo G.10; Dekel,Avishai11; Kocevski,Dale12; Hathi,Nimish P.6; Croton,Darren13; Huertas-Company,M.14; Meng,Xianmin15; Tong,Wei1; Liu,Lu1
Source PublicationThe Astrophysical Journal
AbstractAbstract We investigate the galaxy quenching process at intermediate redshift using a sample of ~4400 galaxies with M*?>?109?M⊙ between redshift 0.5 and 1.0 in all five CANDELS fields. We divide this sample, using the integrated specific star formation rate (sSFR), into four subgroups: star-forming galaxies (SFGs) above and below the ridge of the star-forming main sequence (SFMS), transition galaxies and quiescent galaxies. We study their UVI (U ? V versus V ? I) color gradients to infer their sSFR gradients out to twice effective radii. We show that on average both star-forming and transition galaxies at all masses are not fully quenched at any radii, whereas quiescent galaxies are fully quenched at all radii. We find that at low masses (M*?=?109–1010?M⊙) SFGs both above and below the SFMS ridge generally have flat sSFR profiles, whereas the transition galaxies at the same masses generally have sSFRs that are more suppressed in their outskirts. In contrast, at high masses (M*?>?1010.5?M⊙), SFGs above and below the SFMS ridge and transition galaxies generally have varying degrees of more centrally suppressed sSFRs relative to their outskirts. These findings indicate that at z?~?0.5–1.0 the main galaxy quenching mode depends on its already formed stellar mass, exhibiting a transition from “the outside-in” at M*?≤?1010?M⊙ to “the inside-out” at M*?>?1010.5?M⊙. In other words, our findings support that internal processes dominate the quenching of massive galaxies, whereas external processes dominate the quenching of low-mass galaxies.
Keywordgalaxies: high-redshift galaxies: photometry galaxies: star formation
WOS IDIOP:0004-637X-860-1-aac20d
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.College of Physical Science and Technology, Shenyang Normal University, Shenyang 110034, People's Republic of China;
2.University of California Observatories and the Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USA
3.Department of Physics and Astronomy, University of Missouri, Columbia, MO 65211, USA
4.Department of Astronomy, University of Michigan, Ann Arbor, MI, USA
5.Department of Physics and Astronomy, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA
6.Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
7.Purple Mountain Observatory, Chinese Academy of Sciences, 2 West-Beijing Road, Nanjing 210008, People's Republic of China
8.Astronomy Department, Orange Coast College, Costa Mesa, CA 92626, USA
9.University of the Pacific, Department of Physics, 3601 Pacific Avenue Stockton, CA 95211, USA
10.Departamento de Astrofísica, Facultad de CC. Físicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
11.Center for Astrophysics and Planetary Science, Racah Institute of Physics, The Hebrew University, Jerusalem, Israel
12.Department of Physics and Astronomy, Colby College, Mayflower Hill Drive, Waterville, ME 0490, USA
13.Centre for Astrophysics and Supercomputing, Swinburne University of Technology, P.O. Box 218, Hawthorn, Victoria 3122, Australia
14.Sorbonne Universit, Observatoire de Paris, Universit PSL, Universit Paris Diderot, CNRS, LERMA, Paris, France
15.National Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Road, Beijing 100012, People's Republic of China
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GB/T 7714
Liu,F. S.,Jia,Meng,Yesuf,Hassen M.,et al. On the Transition of the Galaxy Quenching Mode at 0.5?
APA Liu,F. S..,Jia,Meng.,Yesuf,Hassen M..,Faber,S. M..,Koo,David C..,...&Liu,Lu.(2018).On the Transition of the Galaxy Quenching Mode at 0.5?The Astrophysical Journal,860(1).
MLA Liu,F. S.,et al."On the Transition of the Galaxy Quenching Mode at 0.5?The Astrophysical Journal 860.1(2018).
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