Probing the nature of dark matter with accreted globular cluster streams

Understand

The steepness of the central density profiles of dark matter (DM) in low-mass galaxy halos (e.g.

• dwarf galaxies) is a powerful probe of the nature of DM.
• We propose a novel scheme to probe the inner profiles of galaxy subhalos using stellar streams.
• We show that the present day morphological and dynamical properties of accreted globular cluster (GC) streams - those produced from tidal stripping of GCs that initially evolved within satellite galaxies and later merged with the Milky Way (MW) - are sensitive to the central DM density profile and mass of their parent satellites.