Dynamical gravastars may evade no-go results for exotic compact objects

Abstract

Using graphs plotted from the Mathematica notebooks posted with our paper "Dynamical Gravastars", we show that a dynamical gravastar has no hard surface, and that a second light sphere resides in the deep interior where there is maximum time dilation. These facts may permit dynamical gravastars to evade no-go results for exotic compact objects relating to light leakage inside the shadow, and nonlinear instabilities arising from an interior light sphere. Testing either of these surmises will require further detailed modeling calculations.