论文标题
Almaquest调查IX：已解决恒星形成主要序列的性质
The ALMaQUEST Survey IX: The nature of the resolved star forming main sequence
论文作者
论文摘要
我们调查了星形形成速率（$σ_{\ rm sfr} $）的表面密度之间的缩放关系性质，恒星质量（$σ_*$）和分子气体质量（$σ_{\ rm H_2} $），旨在区分主要的关系，以区分其他关系，而不是基本关系。我们使用Almaquest调查并通过使用部分相关和随机森林回归技术来分析数据。我们明确地发现，最强的内在相关性在$σ_{\ rm sfr} $和$σ_{\ rm h_2} $（即已解决的schmidt-kennicutt关系），然后是$ = _ {rm h_2} $ = \ rm h_2} $（rm h_2} $ c的相关性）序列，rmgms）。 Once these two correlations are taken into account, we find that there is no evidence for any intrinsic correlation between $Σ_{\rm SFR}$ and $Σ_*$, implying that 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恒星质量。
We investigate the nature of the scaling relations between the surface density of star formation rate ($Σ_{\rm SFR}$), stellar mass ($Σ_*$), and molecular gas mass ($Σ_{\rm H_2}$), 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 ALMaQUEST 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 $Σ_{\rm SFR}$ and $Σ_{\rm H_2}$ (i.e. the resolved Schmidt-Kennicutt relation), followed by the correlation between $Σ_{\rm H_2}$ 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 $Σ_{\rm SFR}$ and $Σ_*$, implying that 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.
