论文标题
h $α$亮度和恒星质量依赖星系星系的聚类为$ 0.7 <z <z <1.5 $，3d-hst
The H$α$ luminosity and stellar mass dependent clustering of star-forming galaxies at $0.7 < z < 1.5$ with 3D-HST
论文作者
论文摘要
我们将星系聚类幅度的依赖性测量为$ 0.7 <z <1.5 $，以评估环境影响这些属性的程度。尽管这些关系在当地宇宙中得到了很好的确定，但它们在早期的众所周知。为了进行此分析，我们利用近红外HST WFC3 Grism光谱数据在3D-HST调查的一部分获得的五个烛台中。我们使用$ \ sim $ 6,000星系进行预测的2分相关函数测量，并具有准确的红移，$ m _*$和H $α$ luminosisities。我们发现聚类幅度对H $α$光度的浓度有很强的依赖性，因此很依赖SFR。但是，在固定的$ m _*$下，对H $α$光度的聚类依赖性大大消除了。我们使用条件光度函数模型以及新开发的条件恒星质量和H $α$ luminosity分布模型对这些星系的聚类建模。这些表明，具有较高SFR的星系往往生活在较高的质量光环中，但这在很大程度上是由SFR和$ M _*$之间的关系驱动的。最后，我们表明，在固定$ m _*$下的聚类振幅与h $α$光度之间的小剩余相关性很可能是由于卫星星系的sfr- $ m _*$关系扩大而驱动的。
We present measurements of the dependence of the clustering amplitude of galaxies on their star formation rate (SFR) and stellar mass ($M_*$) at $0.7 < z < 1.5$ to assess the extent to which environment affects these properties. While these relations are well determined in the local universe, they are much more poorly known at earlier times. For this analysis we make use of the near-IR HST WFC3 grism spectroscopic data in the five CANDELS fields obtained as part of the 3D-HST survey. We make projected 2-point correlation function measurements using $\sim$6,000 galaxies with accurate redshifts, $M_*$ and H$α$ luminosities. We find a strong dependence of clustering amplitude on H$α$ luminosity and thus SFR. However, at fixed $M_*$, the clustering dependence on H$α$ luminosity is largely eliminated. We model the clustering of these galaxies within the Halo Occupation Distribution framework using the conditional luminosity function model and the newly developed conditional stellar mass and H$α$ luminosity distribution model. These show that galaxies with higher SFRs tend to live in higher mass haloes, but this is largely driven by the relationship between SFR and $M_*$. Finally, we show that the small residual correlation between clustering amplitude and H$α$ luminosity at fixed $M_*$ is likely being driven by a broadening of the SFR-$M_*$ relationship for satellite galaxies.
