The problem of gravitation near the Schwarzschild radius is addressed. pressure due to free fall velocity introduced. At Schwarz-schild radius, this produces force balancing gravity thus stopping collapse matter. minimum source defined as a at which proton reaches Planck energy. compact object thin shell considered. assumed decay scale into positron and hypothetical neutrinos. Under accretion o...

Spatially homogeneous Bianchi type-II, VIII and IX anisotropic, as well as isotropic cosmological models can be obtained in a scalar tensor theory of gravitation proposed by Saez and Ballester (1986) when the source for energy momentum tensor is a bulk viscous fluid containing one-dimensional cosmic strings. All the models obtained and presented here are expanding, non-rotating and accelerating...

Abstract We investigate the gravitational wave spectrum originating from cosmological first-order phase transition. compare two models: one is a scalar field model without gravitation, while other with gravitation. Based on sensitivity curves of LISA space-based interferometer stochastic gravitational-wave background, we difference between spectra former and latter cases obtained bubble collisi...