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請使用永久網址來引用或連結此文件:
https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/123360
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| 題名: | The ALMaQUEST Survey X: what powers merger induced star formation? |
| 作者: | Mallory D Thorp, Sara L Ellison, Hsi-An Pan, Lihwai Lin, David R Patton, Asa F L Bluck, Dan Walters, Jillian M Scudder |
| 關鍵詞: | galaxies:evolution;galaxies:interactions;galaxies:star formation |
| 日期: | 2022-08-16 |
| 上傳時間: | 2023-04-28 17:46:44 (UTC+8) |
| 出版者: | The Royal Astronomical Society |
| 摘要: | Galaxy mergers are known to trigger both extended and central star formation. However, what remains to be understood is whether this triggered star formation is facilitated by enhanced star formation efficiencies (SFEs), or an abundance of molecular gas fuel. This work presents spatially resolved measurements of CO emission collected with the Atacama Large Millimetre Array (ALMA) for 20 merging galaxies (either pairs or post-mergers) selected from the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey. Eleven additional merging galaxies are selected from the ALMA MaNGA QUEnching and STar formation (ALMaQUEST) survey, resulting in a set of 31 mergers at various stages of interaction and covering a broad range of star formation rates (SFRs). We investigate galaxy-to-galaxy variations in the resolved Kennicutt–Schmidt relation, (rKS: ΣH2
versus ΣSFR), the resolved molecular gas main sequence (rMGMS: Σ⋆ versus ΣH2
), and the resolved star-forming main sequence (rSFMS: Σ⋆ versus ΣSFR). We quantify offsets from these resolved relations to determine if SFR, molecular gas fraction, or/and SFE is/are enhanced in different regions of an individual galaxy. By comparing offsets in all three parameters, we can discern whether gas fraction or SFE powers an enhanced ΣSFR. We find that merger-induced star formation can be driven by a variety of mechanisms, both within a galaxy and between different mergers, regardless of interaction stage. |
| 關聯: | Monthly Notices of the Royal Astronomical Society 516(1), p.1462-1480 |
| DOI: | 10.1093/mnras/stac2288 |
| 顯示於類別: | [物理學系暨研究所] 期刊論文
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