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When starting with a static, spherically-symmetric ansatz, there are twotypes of black hole solutions in dRGT massive gravity: (i) exact Schwarzschildsolutions which exhibit no Yukawa suppression at large distances and (ii)solutions in which the dynamical metric and the reference metric aresimultaneously diagonal and which inevitably exhibit coordinate-invariantsingularities at the horizon. In this work we investigate the possibility ofblack hole solutions which can accommodate both a non-singular horizon andYukawa asymptotics. In particular, by adopting a time-dependent ansatz, wederive perturbative analytic solutions which possess non-singular horizons.These black hole solutions are indistinguishable from Schwarzschild black holesin the limit of zero graviton mass. At finite graviton mass, they dependexplicitly on time. However, we demonstrate that the location of the apparenthorizon is not necessarily time-dependent, indicating that these black holesare not necessarily accreting or evaporating (classically). In deriving theseresults, we also review and extend known results about static black holesolutions in massive gravity.

Non-Singular Black Holes in Massive Gravity: Time-Dependent Solutions