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Spherical Black Holes cannot Support Scalar Hair

General Relativity and Quantum Cosmology 2010-11-19 v1

Abstract

The static spherically symmetric ``black hole solution" of the Einstein - conformally invariant massless scalar field equations known as the BBMB ( Bocharova, , Bronikov, Melinkov, Bekenstein) black hole is critically examined. It is shown that the stress energy tensor is ill-defined at the horizon, and that its evaluation through suitable regularization yields ambiguous results. Consequently, the configuration fails to represent a genuine black hole solution. With the removal of this solution as a counterexample to the no hair conjecture, we argue that the following appears to be true: Spherical black holes cannot carry any kind of classical scalar hair.

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Cite

@article{arxiv.gr-qc/9712083,
  title  = {Spherical Black Holes cannot Support Scalar Hair},
  author = {D. Sudarsky and T. Zannias},
  journal= {arXiv preprint arXiv:gr-qc/9712083},
  year   = {2010}
}

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