Linking bar- and interaction-driven molecular gas concentration with centrally enhanced star formation in EDGE-CALIFA galaxies
文献类型：期刊论文
| 作者 | Chown, Ryan1,6,7; Li, Cheng6,7; Athanassoula, E.5; Li, Niu6,7; Wilson, Christine D.1; Lin, Lin4 ; Mo, Houjun3,6,7; Parker, Laura C.1; Xiao, Ting2
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2019-04-01 |
| 卷号 | 484期号:4页码:5192-5211 |
| 关键词 | galaxies: bulges galaxies: evolution galaxies: interactions galaxies: spiral galaxies: star formation |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnras/stz349 |
| 英文摘要 | We study the spatially resolved star formation history (SFH) and molecular gas distribution of 58 nearby galaxies, using integral field spectroscopy from the CALIFA survey and CO J = 1-0 intensity mapping from the CARMA EDGE survey. We use the 4000 angstrom break (D-n(4000)), the equivalent width (EW) of the H delta absorption line (EW(H delta(A))), and the EW of the Ha emission line (EW(H alpha)) to measure the recent SFH of these galaxies. We measure radial profiles of the three SFH indicators and molecular gas mass surface density, from which we measure the level of centrally enhanced star formation and the molecular gas concentration. When we separate our galaxies into categories of barred (17 galaxies), unbarred (24 galaxies), and merging/paired (17 galaxies), we find that the galaxies that have centrally enhanced star formation (19/58) are either barred (13/19) or in mergers/pairs (6/19) with relatively high molecular gas concentrations. A comparison between our barred galaxies and a snapshot of a hydrodynamic N-body simulation of a barred galaxy shows that the current theory of bar formation and evolution can qualitatively reproduce the main features of the observed galaxies in our sample, including both the sharp decrease of stellar age in the galactic centre and the gradual decrease of age with increasing distance from centre. These findings provide substantial evidence for a picture in which cold gas is transported inwards by a bar or tidal interaction, which leads to the growth and rejuvenation of star formation in the central region. |
| 资助项目 | National Key R&D Program of China[2018YFA0404502] ; National Key Basic Research Program of China[2015CB857004] ; National Science Foundation of China[11703063] ; National Science Foundation of China[11233005] ; National Science Foundation of China[11325314] ; National Science Foundation of China[11320101002] ; National Science Foundation of China[11733004] ; McMaster University ; Mitacs Globalink Research Award[IT10717] ; China Scholarship Council ; CNES ; project Equip@Meso of the program 'Investissements d'Avenir'[ANR-10-EQPX-29-01] ; NSF[AST-1517528] ; Natural Sciences and Engineering Research Council of Canada ; Canada Research Chairs program |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000462414400053 |
| 出版者 | OXFORD UNIV PRESS |
| 源URL | [http://119.78.226.72/handle/331011/31861]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | Chown, Ryan; Li, Cheng |
| 作者单位 | 1.McMaster Univ, Dept Phys & Astron, 1280 Main St W, Hamilton, ON L8S 4L8, Canada 2.Zhejiang Univ, Phys Dept, Hangzhou 310058, Zhejiang, Peoples R China 3.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA 4.Shanghai Astron Observ, Nandan Rd 80, Shanghai 200030, Peoples R China 5.Aix Marseille Univ, CNRS, CNES, LAM,UMR 7326, F-13388 Marseille 13, France 6.Tsinghua Univ, Phys Dept, Beijing 100084, Peoples R China 7.Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chown, Ryan,Li, Cheng,Athanassoula, E.,et al. Linking bar- and interaction-driven molecular gas concentration with centrally enhanced star formation in EDGE-CALIFA galaxies[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,484(4):5192-5211. |
| APA | Chown, Ryan.,Li, Cheng.,Athanassoula, E..,Li, Niu.,Wilson, Christine D..,...&Xiao, Ting.(2019).Linking bar- and interaction-driven molecular gas concentration with centrally enhanced star formation in EDGE-CALIFA galaxies.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,484(4),5192-5211. |
| MLA | Chown, Ryan,et al."Linking bar- and interaction-driven molecular gas concentration with centrally enhanced star formation in EDGE-CALIFA galaxies".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 484.4(2019):5192-5211. |
入库方式： OAI收割
来源：上海天文台
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