Inhomogeneous imperfect fluid spherical models without Big-Bang singularity

Details Inhomogeneous imperfect fluid spherical models without Big-Bang singularity Inhomogeneous imperfect fluid spherical models without Big-Bang singularity

1997-05-14

arxiv.org/abs/gr-qc/9705038v1

J.Astrophys.Astron. 18 (1997) 343

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

8 pages, LaTeX version

Scientific paper

10.1007/BF02709325

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 model, which can be suitably chosen for non-singular behaviour and there exist multiplicity of such choices.

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