Instability of cosmological event horizons of non-static global cosmic strings

Details Instability of cosmological event horizons of non-static global cosmic strings Instability of cosmological event horizons of non-static global cosmic strings

1997-06-23

arxiv.org/abs/gr-qc/9706072v1

Phys.Rev.D56:6217-6224,1997

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Latex, no figures

Scientific paper

10.1103/PhysRevD.56.6217

The stability of the cosmological event horizons found recently by Gregory [Phys. Rev. D54, 4955 (1996)] for a class of non-static global cosmic strings is studied. It is shown that they are not stable to both test particles and physical perturbations. In particular, the back reaction of the perturbations of null dust fluids will turn them into spacetime singularities. The resulted singularities are strong in the sense that the distortion of test particles diverges logarithmically when these singular hypersurfaces are approaching.

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