SDSS-IV MaNGA-resolved Star Formation and Molecular Gas Properties of Green Valley Galaxies: A First Look with ALMA and MaNGA
文献类型：期刊论文
| 作者 | Lin, Lihwai21; Belfiore, Francesco18,19,20; Pan, Hsi-An21; Bothwell, M. S.19,20; Hsieh, Pei-Ying21; Huang, Shan17; Xiao, Ting16; Sanchez, Sebastian F.15; Hsieh, Bau-Ching21; Masters, Karen14 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2017-12-10 |
| 卷号 | 851期号:1 |
| ISSN号 | 0004-637X |
| 关键词 | Galaxies: Evolution |
| DOI | 10.3847/1538-4357/aa96ae |
| 英文摘要 | We study the role of cold gas in quenching star formation in the green valley by analyzing ALMA (CO)-C-12 (1-0) observations of three galaxies with resolved optical spectroscopy from the MaNGA survey. We present resolution-matched maps of the star formation rate and molecular gas mass. These data are used to calculate the star formation efficiency (SFE) and gas fraction (f(gas)) for these galaxies separately in the central "bulge" regions and outer disks. We find that, for the two galaxies whose global specific star formation rate (sSFR) deviates most from the star formation main sequence, the gas fraction in the bulges is significantly lower than that in their disks, supporting an "inside-out" model of galaxy quenching. For the two galaxies where SFE can be reliably determined in the central regions, the bulges and disks share similar SFEs. This suggests that a decline in f(gas). is the main driver of lowered sSFR in bulges compared to disks in green valley galaxies. Within the disks, there exist common correlations between the sSFR and SFE and between sSFR and f(gas). on kiloparsec scales-the local SFE or f(gas). in the disks declines with local sSFR. Our results support a picture in which the sSFR in bulges is primarily controlled by f(gas), whereas both SFE and f(gas). play a role in lowering the sSFR in disks. A larger sample is required to confirm if the trend established in this work is representative of the green valley as a whole. |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000425379000001 |
| 源URL | [http://119.78.226.72/handle/331011/32509]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | Lin, Lihwai |
| 作者单位 | 1.Apache Point Observ, POB 59, Sunspot, NM 88349 USA 2.Univ Tokyo, Inst Adv Study, Kavli Inst Phys & Math Universe WPI, Kashiwa, Chiba 2778583, Japan 3.Univ Nottingham, Sch Phys & Astron, Univ Pk, Nottingham NG7 2RD, England 4.Univ Wisconsin, Dept Astron, 475N Charter St, Madison, WI 53703 USA 5.Astrophys Res Consortium, Phys Astron Bldg,Rm C319,3910 15th Ave NE, Seattle, WA 98195 USA 6.Pontificia Univ Catolica Chile, Inst Astrofis, Av Vicuna Mackenna 4860, Santiago 7820436, Chile 7.Inst Milenio Astrofis, Av Vicuna Mackenna 4860, Santiago, Chile 8.Univ Texas Austin, McDonald Observ, 1 Univ Stn, Austin, TX 78712 USA 9.Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow, Russia 10.New Mexico State Univ, POB 59, Sunspot, NM 88349 USA |
| 推荐引用方式 GB/T 7714 | Lin, Lihwai,Belfiore, Francesco,Pan, Hsi-An,et al. SDSS-IV MaNGA-resolved Star Formation and Molecular Gas Properties of Green Valley Galaxies: A First Look with ALMA and MaNGA[J]. ASTROPHYSICAL JOURNAL,2017,851(1). |
| APA | Lin, Lihwai.,Belfiore, Francesco.,Pan, Hsi-An.,Bothwell, M. S..,Hsieh, Pei-Ying.,...&Thomas, Daniel.(2017).SDSS-IV MaNGA-resolved Star Formation and Molecular Gas Properties of Green Valley Galaxies: A First Look with ALMA and MaNGA.ASTROPHYSICAL JOURNAL,851(1). |
| MLA | Lin, Lihwai,et al."SDSS-IV MaNGA-resolved Star Formation and Molecular Gas Properties of Green Valley Galaxies: A First Look with ALMA and MaNGA".ASTROPHYSICAL JOURNAL 851.1(2017). |
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来源：上海天文台
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