Singularity Free Inhomogeneous Cosmological Stiff Fluid Models
نویسندگان
چکیده
We present a singularity free class of inhomogeneous cylindrical universes filled with stiff perfect fluid (ρ = p). Its matter free (ρ = 0) limit yield two distinct vacuum spacetimes which can be considered as analogues of Kasner solution for inhomogeneous singularity free spacetime.
منابع مشابه
Geodesically complete nondiagonal inhomogeneous cosmological solutions in dilatonic gravity with stiff perfect fluid
New nondiagonal G2 inhomogeneous cosmological solutions are presented in a wide range of scalar-tensor theories with a stiff perfect fluid as a matter source. The solutions have no big-bang singularity or any other curvature singularities. The dilaton field and the fluid energy density are everywhere regular, too. The geodesic completeness of the solutions is investigated. 04.50.+h, 04.20.Jb, 9...
متن کاملGeodesically complete nondiagonal inhomogeneous cosmological solutions in dilatonic gravity with a stiff perfect fluid
New nondiagonal G2 inhomogeneous cosmological solutions are presented in a wide range of scalar-tensor theories with a stiff perfect fluid as a matter source. The solutions have no big-bang singularity or any other curvature singularities. The dilaton field and the fluid energy density are regular everywhere, too. The geodesic completeness of the solutions is investigated. 04.50.+h, 04.20.Jb, 9...
متن کاملNew families of singularity-free cosmological models
During the previous decade the interest for singularity-free cosmological models was supported by the publication of the first known geodesically complete perfect fluid cosmology [1]. Until then such possibility had been overlooked due to the restrictive conditions imposed by singularity theorems [2], [3]. These theorems required physically reasonable restrictions such as energy, causality and ...
متن کاملPlane-symmetric Inhomogeneous Bulk Viscous Cosmological Models with Variable Λ
In recent years cosmological models exhibiting plane symmetry have attracted the attention of various authors. At the present state of evolution, the universe is spherically symmetric and the matter distribution in it is isotropic and homogeneous. But in its early stages of evolution, it could have not had a smoothed out picture. Close to the big bang singularity, neither the assumption of sphe...
متن کاملInhomogeneous imperfect fluid spherical models without Big-Bang singularity
So far all known singularity-free cosmological models are cylindrically symmetric. Here we present a new family of spherically symmetric non-singular models filled with imperfect fluid and radial heat flow, and satisfying the weak and strong energy conditions. For large t anisotropy in pressure and heat flux tend to vanish leading to a perfect fluid. There is a free function of time in the mode...
متن کامل