论文标题
分子气体主序列和施密特 - 肯尼科的关系是基本的，恒星形成的主序列是（有用的）副产品
The Molecular-Gas Main Sequence and Schmidt-Kennicutt relation are fundamental, the Star-Forming Main Sequence is a (useful) byproduct
论文作者
论文摘要
我们研究了局部恒星形成的星系，研究了星形形成率（SFR），恒星质量（$ M _*$）和分子气体质量（$ M_ {H_2} $）之间的关系。我们进一步研究了高Z（Z = 1-3）星系的这些关系以及活性银核（AGN）局部样本的宿主。我们探讨了这些依赖性中的哪些是固有的，哪些是通过采用部分相关系数和随机森林消退来间接副产品。 We find that for local star-forming galaxies, high-z galaxies, and AGN host galaxies, the Schmidt-Kennicutt relation (SK, between $M_{H_2}$ and SFR), and the Molecular Gas Main Sequence (MGMS, between $M_{H_2}$ and $M_*$) are intrinsic primary relations, while the relationship between $M_*$ and SFR,即恒星形成主序列（SFM）是前两个的间接副产品。因此，恒星形成的主要序列不是局部或高红移星系的基本缩放关系。我们找到了在宇宙时间内MGM的演变和SK关系的证据，在给定的恒星质量下，红移越高，分子气体质量和恒星形成效率越大。我们提供了MGMS和SK关系的参数化与红移的演变，显示了它们如何结合形成观察到的SFM的演变。此外，我们发现本地AGN主机星系遵循AGN-MGMS关系（以及AGN-SK关系），与本地SF Galaxies相比，对于给定的$ M _*$，MGMS被抵消至降低$ M_ {H_2} $。
We investigate the relationship between the star formation rate (SFR), stellar mass ($M_*$) and molecular gas mass ($M_{H_2}$) for local star-forming galaxies. We further investigate these relationships for high-z (z=1-3) galaxies and for the hosts of a local sample of Active Galactic Nuclei (AGN). We explore which of these dependencies are intrinsic and which are an indirect by-product by employing partial correlation coefficients and random forest regression. We find that for local star-forming galaxies, high-z galaxies, and AGN host galaxies, the Schmidt-Kennicutt relation (SK, between $M_{H_2}$ and SFR), and the Molecular Gas Main Sequence (MGMS, between $M_{H_2}$ and $M_*$) are intrinsic primary relations, while the relationship between $M_*$ and SFR, i.e. the Star-Forming Main Sequence (SFMS), is an indirect by-product of the former two. Hence the Star-Forming Main Sequence is not a fundamental scaling relation for local or high-redshift galaxies. We find evidence for both the evolution of the MGMS and SK relation over cosmic time, where, at a given stellar mass, the higher the redshift, the greater the molecular gas mass and the star formation efficiency. We offer a parameterisation of both the MGMS and SK relation's evolution with redshift, showing how they combine to form the observed evolution of the SFMS. In addition, we find that the local AGN host galaxies follow an AGN-MGMS relation (as well as a AGN-SK relation), where the MGMS is offset to lower $M_{H_2}$ for a given $M_*$ compared to local SF galaxies.
