Network of domain walls on soliton stars - art. no. 065022

We explore the idea of a network of domain walls appearing on the surface o f a soliton star. We show that for a suitable fine-tuning among the paramet ers of the model we can find localized fermion zero modes only on the netwo rk of domain walls. In this scenario. the soliton star becomes unstable and decays into free particles before the cold-matter upper mass limit is achi eved. However, if fermions do not bind to the network of domain walls, the network becomes neutral. imposing a new lower bound on the charge of the so liton star, slightly raising its critical mass.