Subhaloes gone Notts: Subhaloes as tracers of the dark matter halo shape
  We study the shapes of subhalo distributions from four dark-matter-only
simulations of Milky Way type haloes. Comparing the shapes derived from the
subhalo distributions at high resolution to those of the underlying dark matter
fields we find the former to be more triaxial if theanalysis is restricted to
massive subhaloes. For three of the four analysed haloes the increased
triaxiality of the distributions of massive subhaloes can be explained by a
systematic effect caused by the low number of objects. Subhaloes of the fourth
halo show indications for anisotropic accretion via their strong triaxial
distribution and orbit alignment with respect to the dark matter field. These
results are independent of the employed subhalo finder. Comparing the shape of
the observed Milky Way satellite distribution to those of high-resolution
subhalo samples from simulations, we find an agreement for samples of bright
satellites, but significant deviations if faint satellites are included in the
analysis. These deviations might result from observational incompleteness.
