On the scatter of the present-day stellar metallicity-mass relation of
  cluster dwarf galaxies
  We examine the scatter of the relation between stellar mass and stellar
metallicity for cluster dwarf galaxies in the cosmological simulation
Illustris. The mass-metallicity relation exhibits the smallest intrinsic
scatter at the galaxies' times of peak stellar mass, suggesting stellar mass
stripping to be the primary effect responsible for the rather broad relation at
present. However, for about 40% of galaxies in the high-metallicity tail of the
relation, we find mass stripping to coincide with an increased enrichment of
stellar metallicity, possibly caused by the stripping of low-metallicity stars
in the galaxy outskirts.
