Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
1998-03-11
Phys.Rev.D57:6089-6093,1998
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
No figures, Revtex
Scientific paper
10.1103/PhysRevD.57.6089
The stability of the cosmological event horizons (CEHs) of a class of non-static global cosmic strings is studied against perturbations of gravitational waves and massless scalar field. It is found that the perturbations of gravitational waves always turn the CEHs into non-scalar weak spacetime curvature singularities, while the ones of massless scalar field turn the CEHs either into non-scalar weak singularities or into scalar ones depending on the particular cases considered. The perturbations of test massless scalar field is also studied, and it is found that they do not always give the correct prediction.
Nogales Jose A. C.
Wang Anzhong
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