Neutron star as laboratories for Cosmology
  Neutron stars can be considered a useful and interesting laboratory for Cosmology. With their deep gravitational potential they may accrete dark matter from the galactic halo and subsequent self-annihilation processes could induce an indirect observable signal this type of matter. In addition, the large densities in the interior of these objects may constitute a test-bench to study hypothesized deviations of fundamental constant values complementary to existing works using constraints at low density from BBN. 
M. Angeles Perez-Garcia
astro-ph.HE astro-ph.CO