New Anisotropic Sudden Singularities and Dimensional Reduction

Abstract

We demonstrate the existence of sudden, finite-time, singularities, with constant scale factor, expansion rate and density, in expanding Bianchi type IX universes with free anisotropic pressures. A new type of non-simultaneous anisotropic sudden singularity arises because of the divergences of the pressures, which may be of barrel or pancake type. The effect of one or more directions of expansion hitting a sudden singularity is tantamount to dimensional reductions as the non-singular directions continue expanding and can see the sudden singularity in their past.

8 pages, no figures, pdf problem corrected

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Cited by in corpus (4)

• Finite-time Cosmological Singularities and the Possible Fate of the Universe
• Sudden singularities in generalized hybrid metric-Palatini cosmologies
• Sudden cosmological singularities in Aether scalar-tensor theories
• Dispersive Friedmann universes and synchronization