Abstract:
We describe dynamically unusual populations with observable
counterparts (backsplash galaxies, wandering stars and high velocity
stars) in the environment in and outside of a Milky Way-like object.
Analysis of VLII halo histories and z=0 distribution allows us to
distinguish which Local Group field galaxies may have passed through
the virial volume of the Milky Way. We find it likely that Tucana,
Cetus, NGC3109, SextansA, SextansB, Antlia, NGC6822, Phoenix, LeoT,
and NGC185 have passed through the Milky Way. Several of these
galaxies contain signatures in their morphology, star formation
history, and/or gas content, that are indicative of evolution seen in
simulations of satellite/parent galactic interactions. We use the
histories of VLII particles that are far outside Rvir at z=0 to
estimate the likelihood of observing inter-galactic supernovae in
current and near-future large-scale time-domain surveys. Finally, we
ask whether a merger history similar to what is seen in VLII should
lead to a significant population of old high-velocity stars associated
with dark matter flows.