论文标题
H $α$ star组的群集和田间星系中的主序列$ z \ sim1.6 $
The H$α$ star formation main sequence in cluster and field galaxies at $z\sim1.6$
论文作者
论文摘要
我们计算基于H $α$α$的恒星形成率，并确定$ z \ sim 1.6 $的三个SPARCS簇成员的星形形成率 - 恒星质量关系，并以与簇相似的红移。我们在整个恒星质量范围内发现聚类和田间星系中的星形星系中的类似恒星形成速率。结果与在类似的红移中其他簇中看到的结果相当，并且与我们先前的光度证据一致，证明了簇中几乎没有淬火活性。我们结果的一种可能的解释是，我们的$ z \ sim 1.6 $簇中的星系最近也被积聚，以显示环境淬火的迹象。簇也可能在动态成熟的情况下还不够成熟，无法在低红移（例如RAM压力剥离或骚扰）下产生重要的环境淬火效果。
We calculate H$α$-based star formation rates and determine the star formation rate-stellar mass relation for members of three SpARCS clusters at $z \sim 1.6$ and serendipitously identified field galaxies at similar redshifts to the clusters. We find similar star formation rates in cluster and field galaxies throughout our range of stellar masses. The results are comparable to those seen in other clusters at similar redshifts, and consistent with our previous photometric evidence for little quenching activity in clusters. One possible explanation for our results is that galaxies in our $z \sim 1.6$ clusters have been accreted too recently to show signs of environmental quenching. It is also possible that the clusters are not yet dynamically mature enough to produce important environmental quenching effects shown to be important at low redshift, such as ram pressure stripping or harassment.
