The Three Hundred project: shapes and radial alignment of satellite,
  infalling, and backsplash galaxies
  Using 324 numerically modelled galaxy clusters we investigate the radial and
galaxy-halo alignment of dark matter subhaloes and satellite galaxies orbiting
within and around them. We find that radial alignment depends on distance to
the centre of the galaxy cluster but appears independent of the dynamical state
of the central host cluster. Furthermore, we cannot find a relation between
radial alignment of the halo or galaxy shape with its own mass. We report that
backsplash galaxies, i.e. objects that have already passed through the cluster
radius but are now located in the outskirts, show a stronger radial alignment
than infalling objects. We further find that there exists a population of well
radially aligned objects passing very close to the central cluster's centre
which were found to be on highly radial orbit.
