The H α luminosity and stellar mass dependent clustering of star-forming galaxies at 0.7 < z < 1.5 with 3D- HST
The H α luminosity and stellar mass dependent clustering of star-forming galaxies at 0.7 < z < 1.5 with 3D- HST
复制标题
使用 3D-HST 计算 0.7 < z < 1.5 处恒星形成星系的 Hα 光度和恒星质量相关的星团
DOI：
10.1093/mnras/stac1889
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发表时间：
2022
影响因子：
4.8
通讯作者：
Zheng, Zheng
中科院分区：
文献类型：
--
作者：
Clontz, Callie;Wake, David;Zheng, Zheng
我们测量了0.7 <z< 1.5时星系的成团幅度与其星星形成率（SFR）和恒星质量（M*）的关系，以评估环境对这些性质的影响程度。虽然这些关系在本机宇宙中得到了很好的确定，但在更早的时候，它们却鲜为人知。对于这种分析，我们利用近infraredHSTWFC 3棱镜光谱数据在5个CANDELS领域获得的3D-HST调查的一部分。我们用精确的红移、M* 和H α光度的10000个星系进行了投影两点相关函数测量。我们发现集群幅度对H α亮度以及SFR有很强的依赖性。然而，在固定的M *，在很大程度上消除了对H α光度的聚类依赖。我们用条件光度函数模型和新发展的条件恒星质量和H α光度分布模型在晕占据分布框架内模拟了这些星系的成团。这些结果表明，具有较高SFR的星系倾向于生活在较高质量的晕中，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 * 的集群振幅和H α光度之间的小的剩余相关性可能是由卫星星系的SFR-M* 关系的扩大驱动的。
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-infraredHSTWFC3 grism spectroscopic data in the five CANDELS fields obtained as part of the 3D-HSTsurvey. We make projected two-point correlation function measurements using ∼6000 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 fixedM*, 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 andM*. Finally, we show that the small residual correlation between clustering amplitude and H α luminosity at fixedM*is likely being driven by a broadening of the SFR–M*relationship for satellite galaxies.