Gravitational collapse of an interacting vacuum energy density with an anisotropic fluid

Publication date: Available online 8 March 2019Source: Physics of the Dark UniverseAuthor(s): Hasrat Hussain Shah, Farook Rahaman, Amna Ali, Sabirudin MollaAbstractWe investigate the effects of anisotropic pressure on the gravitational collapse of spherically symmetric, gravitational bound objects. The concept of a pressure anisotropy in stellar models is produced by a large set of physical phenomena in high density regimes. We consider a gravitational collapse process of the anisotropic fluid interacting with a growing vacuum energy density. We consider the full general-relativistic treatment of this problem and obtain exact solutions for various forms of the equation of state (k,l):
pt=kρ and pr=lρ,(l+2k)<−1 connecting the tangential and radial pressures respectively.

Source: Physics of the Dark Universe - March 10, 2019 Category: Physics Source Type: research