Null Singularity Formation by Scalar Fields in Colliding Waves and Black Holes

Details Null Singularity Formation by Scalar Fields in Colliding Waves and Black Holes Null Singularity Formation by Scalar Fields in Colliding Waves and Black Holes

2002-03-06

arxiv.org/abs/gr-qc/0203019v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

21 pages, 2 ps figures, submitted for publication

Scientific paper

It was believed that when gravitational, electromagnetic and scalar waves interact, a spacelike curvature singularity or Cauchy horizon develops because of mutual focusing. We show with an exact solution that the collision of Einstein-Maxwell-Scalar fields, in contrast to previous studies, predicts singularities on null surfaces and that this is a transition phase between spacelike singularities and regular horizons. Divergences of tidal forces in the null singularities is shown to be weaker relative to the spacelike ones. Using the local isometry between colliding plane waves and black holes, we show that the inner horizon of Reissner-Nordstrom black hole transforms into a null singularity when a particular scalar field is coupled to it. We also present an analytic exact solution, which represents a Reissner-Nordstrom black hole with scalar hair in between the ergosphere.

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