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| 題名: | The ALMaQUEST survey IX: the nature of the resolved star forming main sequence |
| 作者: | Baker, William M;Maiolino, Roberto;Bluck, Asa F L;Lin, Lihwai;Ellison, Sara L;Belfiore, Francesco;Pan, Hsi-An;Thorp, Mallory |
| 關鍵詞: | galaxies: evolution;galaxies: formation;galaxies: fundamental parameters;galaxies: star formation |
| 日期: | 2022-03 |
| 上傳時間: | 2022-03-10 12:10:40 (UTC+8) |
| 摘要: | We investigate the nature of the scaling relations between the surface density of star formation rate (ΣSFR), stellar mass (Σ*), and molecular gas mass (ΣH2), aiming at distinguishing between the relations that are primary, i.e. more fundamental, and those which are instead an indirect by-product of the other relations. We use the ALMA-MaNGA QUEnching and STar formation survey and analyse the data by using both partial correlations and random forest regression techniques. We unambiguously find that the strongest intrinsic correlation is between ΣSFR and ΣH2 (i.e. the resolved Schmidt–Kennicutt relation), followed by the correlation between ΣH2 and Σ* (resolved molecular gas main sequence, rMGMS). Once these two correlations are taken into account, we find that there is no evidence for any intrinsic correlation between ΣSFR and Σ*, implying that star formation rate (SFR) is entirely driven by the amount of molecular gas, while its dependence on stellar mass (i.e. the resolved star forming main sequence, rSFMS) simply emerges as a consequence of the relationship between molecular gas and stellar mass. |
| 關聯: | Monthly Notices of the Royal Astronomical Society 510(3), p.3622-3628 |
| DOI: | 10.1093/mnras/stab3672 |
| 顯示於類別: | [物理學系暨研究所] 期刊論文
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