On the Transition of the Galaxy Quenching Mode at 0.5?
文献类型：期刊论文
| 作者 | 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 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2018-06-12 |
| 卷号 | 860期号:1 |
| ISSN号 | 0004-637X |
| 关键词 | galaxies: high-redshift galaxies: photometry galaxies: star formation |
| DOI | 10.3847/1538-4357/aac20d |
| 英文摘要 | Abstract 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. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-860-1-AAC20D |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/23470]  |
| 专题 | 中国科学院紫金山天文台 |
| 作者单位 | 1.College of Physical Science and Technology, Shenyang Normal University, Shenyang 110034, People's Republic of China; fengshan.liu@yahoo.com 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 |
| 推荐引用方式 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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来源：紫金山天文台
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