论文标题
环境对宇宙场中星形星系的恒星形成活动和恒星质量的影响
Effect of the environment on star formation activity and stellar mass for star-forming galaxies in the COSMOS field
论文作者
论文摘要
我们研究了环境和星系主序列之间的关系（恒星质量与恒星形成速率之间的关系），以及环境与无线电发光度（p $ _ {\ rm 1.4GHz} $）之间的关系与环境对星系的影响的新启示。我们使用由三种不同环境（田间，细丝，群集）和三种不同的星系类型（卫星，中央，隔离）组成的VLA-COSMOS 3 GHz目录，该目录由恒星形成星系（SFG）和静态星系（AGN）组成。我们首次对SFG的分布进行了比较分析，从文献中考虑了星系环境，并使用0.1 $ \ leq $ Z $ \ leq $ 1.2的无线电观测值。我们的结果证实了SFR在宇宙时间下降，这与文献一致。我们发现，对于不同的$ z $和m $ _ {*} $ bins的MS斜率比MS共识较浅，其逐渐发展向更高的红移箱，而与环境无关。考虑到较大的错误，我们在环境和星系类型上都没有SFR趋势。此外，我们注意到，环境似乎并不是我们样本高恒星质量下MS平坦的原因。
We investigate the relationship between environment and the galaxy main sequence (the relationship between stellar mass and star formation rate) and also the relationship between environment and radio luminosity (P$_{\rm 1.4GHz}$) to shed new light on the effects of the environments on galaxies. We use the VLA-COSMOS 3 GHz catalogue that consists of star-forming galaxies (SFGs) and quiescent galaxies (AGN) in three different environments (field, filament, cluster) and for three different galaxy types (satellite, central, isolated). We perform for the first time a comparative analysis of the distribution of SFGs with respect to the main sequence (MS) consensus region from the literature, taking into account galaxy environment and using radio observations at 0.1 $\leq$ z $\leq$ 1.2. Our results corroborate that SFR is declining with cosmic time which is consistent with the literature. We find that the slope of the MS for different $z$ and M$_{*}$ bins is shallower than the MS consensus with a gradual evolution towards higher redshift bins, irrespective of environments. We see no SFR trends on both environments and galaxy type given the large errors. In addition, we note that the environment does not seem to be the cause of the flattening of MS at high stellar masses for our sample.
