Resolving local and global kinematic signatures of satellite mergers
  with billion particle simulations
  In this work we present two new $\sim10^9$ particle self-consistent
simulations of the merger of a Sagittarius-like dwarf galaxy with a Milky
Way-like disc galaxy. One model is a violent merger creating a thick disc, and
a Gaia-Enceladus/Sausage like remnant. The other is a highly stable disc which
we use to illustrate how the improved phase space resolution allows us to
better examine the formation and evolution of structures that have been
observed in small, local volumes in the Milky Way, such as the $z-v_z$ phase
spiral and clustering in the $v_{\mathrm{R}}-v_{\phi}$ plane when compared to
previous works. The local $z-v_z$ phase spirals are clearly linked to the
global asymmetry across the disc: we find both 2-armed and 1-armed phase
spirals, which are related to breathing and bending behaviors respectively.
Hercules-like moving groups are common, clustered in $v_{\mathrm{R}}-v_{\phi}$
in local data samples in the simulation. These groups migrate outwards from the
inner galaxy, matching observed metallicity trends even in the absence of a
galactic bar. We currently release the best fitting `present day' merger
snapshots along with the unperturbed galaxies for comparison.
