Charged gravastars in Rastall-Rainbow gravity

摘要

In this work, we have assumed the spherically symmetric stellar system in the contexts of Rastall-Rainbow gravity theory in the presence of isotropic fluid source with electro-magnetic field. Einstein-Maxwell's field equations have been written in the framework of Rastall-Rainbow gravity. Next, we have discussed the geometry of charged gravastar model. The gravastar consists of three regions: interior region, thin shell region, and exterior region. In the interior region, the gravastar follows the equation of state (EoS) p=-rho, and we have found the solutions of all physical quantities like energy density, pressure, electric field, charge density, gravitational mass, and metric coefficients. In the exterior region, we have obtained the exterior Riessner-Nordstrom solution for vacuum model (p=rho=0). Since in the shell region, the fluid source follows the EoS p=rho (ultra-stiff fluid) and the thickness of the shell of the gravastar is infinitesimal, so by the approximation h展开▼