The Cosmic Environment Overtakes the Local Density in Shaping Galaxy Star Formation
Title: The Cosmic Environment Overtakes the Local Density in Shaping Galaxy Star Formation
Speaker: Yuanyu Hong (Purple Mountain Observatory, Chinese Academy of Sciences)
Time: 12:00, December 18, 2021
Location: 3-302, PMO Xianlin Campus
Abstract: The gas supply from the cosmic web is the key to sustain star formation in galaxies. It remains to be explored how the cosmic large-scale structure (LSS) effects on galaxy evolution at given local environments. In this talk, I will introduce a recent work about how LSS influence galaxies star formation, The authors choose galaxy in a LSS mapped by 732 galaxies with R< 24 mag and redshift at 0.72 ≤ z ≤ 0.75 in the Extended Chandra Deep Field South. By study the relations between SFR and sSFR and , The authors find that star-forming galaxies in the LSS keep star formation at the same level as field, and show no dependence on local density but stellar mass. By study the relation between and , the authors find that the LSS does not influence the quenching of the low-density-environment galaxies around it. Combined together, the article conclude that the cosmic environment of the LSS overtakes the local environment in remaining galaxy star formation to the level of the field.