The list of possible mechanisms that can ultimately inhibit star formation is long and our understanding of their respective roles through cosmic time is still somewhat incomplete. In the broadest sense, they can be divided into external (environment-driven) and internal processes (self quenching), both types usually acting in different mass regimes. For example, statistical samples of massive quiescent galaxies have been used to successfully trace self quenching through cosmic time. Conversely, the same massive quiescent galaxies can also be used as tracers of intermediate-mass (~1e13 Msun) halos, providing an easy way to also statistically probe external quenching processes in group-scale environments. With the advent of large spectroscopic samples, we can precisely quantify the depression of star formation in satellite galaxies belonging to these systems, forming a pattern consistent with infall through a hot circumgalactic and intrahalo medium.
Contact local & organisation : Emanuele DADDI
DAp