Detecting the disruption of dark-matter halos with stellar streams
  Narrow stellar streams in the Milky Way halo are uniquely sensitive to
dark-matter subhalos, but many of these subhalos may be tidally disrupted. I
calculate the interaction between stellar and dark-matter streams using
analytical and $N$-body calculations, showing that disrupting objects can be
detected as low-concentration subhalos. Through this effect, we can constrain
the lumpiness of the halo as well as the orbit and present position of
individual dark-matter streams. This will have profound implications for the
formation of halos and for direct and indirect-detection dark-matter searches.
