Comparing the observable properties of dwarf galaxies on and off the
  Andromeda plane
  The thin, extended planes of satellite galaxies detected around both the
Milky Way and Andromeda are not a natural prediction of the LCDM paradigm.
Galaxies in these distinct planes may have formed and evolved in a different
way (e.g., tidally) to their off-plane neighbours. If this were the case, one
would expect the on- and off-plane dwarf galaxies in Andromeda to have
experienced different evolutionary histories, which should be reflected by the
chemistries, dynamics, and star formation histories of the two populations. In
this work, we present new, robust kinematic observations for 2 on-plane M31
dSphs (And XVI and XVII) and compile and compare all available observational
metrics for the on- and off-plane dwarfs to search for a signal that would
corroborate such a hypothesis. We find that, barring their spatial alignment,
the on- and off-plane Andromeda dwarf galaxies are indistinguishable from one
another, arguing against vastly different formative and evolutionary histories
for these two populations.
