Relativistic stars in mass-varying massive gravity
  Mass-varying massive gravity allows the graviton mass to vary according to
different environments. We investigate neutron star and white dwarf solutions
in this theory and find that the graviton mass can become very large near the
compact stars and settle down quickly to small cosmological values away the
stars, similar to that of black holes in the theory. It is found that there
exists a tower of compact star solutions where the graviton mass decreases
radially to zero non-trivially. We compute the massive graviton effects on the
mass-radius relations of the compact stars, and also compare the relative
strengths between neutron stars and white dwarfs in constraining the parameter
space of mass-varying massive gravity.
