Physical properties of SDSS satellite galaxies in projected phase-space
  We investigate how environment affects satellite galaxies using their
location within the projected phase-space of their host haloes from the Wang et
al.'s group catalogue. Using the Yonsei Zoom in Cluster Simulations, we derive
zones of constant mean infall time T_inf in projected phase-space, and
catalogue in which zone each observed galaxy falls. Within each zone we compute
the mean observed galaxy properties including specific star formation rate,
luminosity-weighted age, stellar metallicity and [alpha/Fe] abundance ratio. By
comparing galaxies in different zones, we inspect how shifting the mean infall
time from recent infallers (mean T_inf < 3 Gyr) to ancient infallers (mean
T_inf > 5 Gyr) impacts galaxy properties at fixed stellar and halo mass.
Ancient infallers are more quenched, and the impact of environmental quenching
is visible down to low host masses (< group masses). Meanwhile, the quenching
of recent infallers is weakly dependent on host mass, indicating they have yet
to respond strongly to their current environment. [alpha/Fe] and especially
metallicity are less dependent on host mass, but show a dependence on mean
T_inf. We discuss these results in the context of longer exposure times for
ancient infallers to environmental effects, which grow more efficient in hosts
with a deeper potential well and a denser intracluster medium. We also compare
our satellites with a control field sample, and find that even the most recent
infallers (mean T_inf < 2 Gyr) are more quenched than field galaxies, in
particular for cluster mass hosts. This supports the role of pre-processing
and/or faster quenching in satellites.
