Timescales for Hi consumption and SFR depletion of satellite galaxies in groups

Understand

We investigate the connection between the HI~content, SFR and environment of galaxies using a hydrodynamic simulation that incorporates scaling relations for galactic wind and a heuristic halo mass-based quenching prescription.

• We run two zoom-in simulations of galaxy groups with $M_{halo}>10^{13}M_\odot$ at z=0, selected to have quiet merger histories.
• We track galaxies as they become satellites, and compute the delay time $\tau_{d}$ during which the satellites are similar to central galaxies at a given stellar mass, and a fading time $\tau_{f}$ during which satellites go from gas-rich and star-forming to gas-poor and quiescent.
• We find $0.7< \tau_{d}< 3$ Gyr at $z=0$, and depends inversely on the satellite halo mass at infall.