Publication date: May 2019
Abstract:
We employ the minimal geometric deformation approach to gravitational
decoupling (MGD-decoupling) in order to generate an exact anisotropic
and non-uniform version of the ultracompact Schwarzschild star, or
‚gravastar‘, proposed by Mazur and Mottola. This new system represents
an ultracompact configuration of radius $R_{S}=2cal{M}$ whose interior
metric can be matched smoothly to a conformally deformed Schwarzschild
exterior. Remarkably, the model satisfies some of the basic requirements
to describe a stable stellar model, such as a positive density
everywhere and decreasing monotonously from the centre, as well as a
non-uniform and monotonic pressure.
Authors:
Ovalle, J.; Posada, C.; Stuchlík, Z.;