Estrelas de solitons oscilantes com rede de paredes de domínios.

Abstract

Oscillating soliton stars (also known as oscillatons) i.e self-gravitating objects, described by a solitonic solution to the coupled system of Einstein-Klein-Gordon equations (EKG) have been studied by numerous authors. Oscillatons can be classified into two branches, the stable and unstable branch. The stable branch is the part where the star has not yet reach a critical mass (upper mass limit Mc), after this critical mass the star enters a regime of instability, in this regime gravitational collapse occurs and final stage of this collapse is the formation of a black hole. In this work we study oscillatons with network of domain walls. We consider a Lagrangian with three scalar fields coupled among themselves by a potential. We choose an appropriate potential to admit the formation of network of domain walls with the oscillatons. With small perturbations applied to this potential, we then compute the EKG equations numerically and analyze the mass profile of this new object. From this results we discuss how the stability of the oscillatons are affected by the network.