所有晚型和早型本星系的中心和卫星的HI和恒星质量二元分布
The HI and stellar mass bivariate distribution of centrals and satellites for all, late- and early-type local galaxies
摘要：
我们的特点的HI气体-恒星质量比，$R_{HI}\equiv M_{HI}/M_{\ast}$的条件分布，给定的恒星质量，$M_{\ast}$，本地星系从$M_{\ast}\sim 10^7$ $10^{12}$ $M_{\odot}$分为中心和卫星，以及到晚和早型星系（LTG和ETG，分别）。为此，我们使用（1）同质的“扩展GALEX Arecibo SDSS调查”，xGASS（Catinella等人，2018），通过重新估计其上限并在我们的统计分析中考虑它们;以及（2）Calette等人报告的HI数据的大量汇编结果。我们使用$R_{HI}$条件分布结合星系恒星质量函数来推断所有星系的双变量$M_{HI}$和$M_{\ast}$分布以及晚/早型和中心/卫星子样本及其组合。平均而言，在低质量和中等质量下，玄武岩的HI气体丰度低于中心，ETG的差异大于LTG;在$M_{\ast}>3-5\times 10^{10}$ $M_{\odot}$，差异可以忽略不计。HI气体含量的差异在LTG和ETG之间比在中心和卫星之间大得多。我们的经验HI质量函数在所有质量下都是由中心星系主导的。经验约束的二元$M_{HI}$和$M_{\ast}$分布这里提出的可以用来比较和约束理论预测，以及产生星系模拟目录。
英文摘要：
We characterize the conditional distributions of the HI gas-to-stellar mass ratio, $R_{HI}\equiv M_{HI}/M_{\ast}$, given the stellar mass, $M_{\ast}$, of local galaxies from $M_{\ast}\sim 10^7$ to $10^{12}$ $M_{\odot}$ separated into centrals and satellites as well as into late- and early-type galaxies (LTGs and ETGs, respectively). To do so, we use (1) the homogeneous "eXtended GALEX Arecibo SDSS Survey", xGASS (Catinella et al. 2018), by re-estimating their upper limits and taking into account them in our statistical analysis; and (2) the results from a large compilation of HI data reported in Calette et al. (2018). We use the $R_{HI}$ conditional distributions combined with the Galaxy Stellar Mass Function to infer the bivariate $M_{HI}$ and $M_{\ast}$ distribution of all galaxies as well of the late/early-type and central/satellite subsamples and their combinations. Satellites are on average less HI gas-rich than centrals at low and intermediate masses, with differences being larger for ETGs than LTGs; at $M_{\ast}>3-5\times 10^{10}$ $M_{\odot}$ the differences are negligible. The differences in the HI gas content are much larger between LTGs and ETGs than between centrals and satellites. Our empirical HI Mass Function is strongly dominated by central galaxies at all masses. The empirically constrained bivariate $M_{HI}$ and $M_{\ast}$ distributions presented here can be used to compare and constrain theoretical predictions as well as to generate galaxy mock catalogues.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
