Homogeneous and isotropic big rips?

Details Homogeneous and isotropic big rips? Homogeneous and isotropic big rips?

2005-07-15

arxiv.org/abs/astro-ph/0507369v1

Phys.Rev.D72:083508,2005

Astronomy and Astrophysics

Astrophysics

8 pages

Scientific paper

10.1103/PhysRevD.72.083508

We investigate the way big rips are approached in a fully inhomogeneous description of the space-time geometry. If the pressure and energy densities are connected by a (supernegative) barotropic index, the spatial gradients and the anisotropic expansion decay as the big rip is approached. This behaviour is contrasted with the usual big-bang singularities. A similar analysis is performed in the case of sudden (quiescent) singularities and it is argued that the spatial gradients may well be non-negligible in the vicinity of pressure singularities.

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