The time delay between star formation quenching and morphological
  transformation of galaxies in clusters: a phase-space view of EDisCS
  We explore the possible effect of cluster environments on the structure and
star formation histories of galaxies by analysing the projected phase-space
(PPS) of intermediate-redshift cluster (0.4<z<0.8). HST I-band imaging data
from the ESO Distant Cluster Survey (EDisCS) allow us to measure deviations of
the galaxies' light distributions from symmetric and smooth profiles using two
parameters, Ares ('asymmetry') and RFF (residual flux fraction or 'roughness').
Combining these structural parameters with age-sensitive spectral indicators
like Hdelta, Hgamma and Dn4000, we establish that in all environments younger
star-forming galaxies of all morphologies are 'rougher' and more asymmetric
than older, more quiescent ones. Combining a subset of the EDisCS clusters we
construct a stacked PPS diagram and find a significant correlation between the
position of the galaxies on the PPS and their stellar ages, irrespective of
their morphology. We also observe an increasing fraction of galaxies with older
stellar populations towards the cluster core, while the galaxies' structural
parameters (Ares and RFF) do not seem to segregate strongly with PPS. These
results may imply that, transformation happens on a longer timescale as they
accumulate and age in the cluster cores.
