Generalized Vaidya Solutions and Misner-Sharp mass for $n$-dimensional massive gravity

Understand

Dynamical solutions are always of interest to people in gravity theories.

• We derive a series of generalized Vaidya solutions in the $n$-dimensional de Rham-Gabadadze-Tolley (dRGT) massive gravity with a singular reference metric.
• Similar to the case of the Einstein gravity, the generalized Vaidya solution can describe shining/absorbing stars.
• Moreover, we also find a more general Vaidya-like solution by introducing a more generic matter field than the pure radiation in the original Vaidya spacetime.