Generic features of Einstein-Aether black holes

Takashi Tamaki and Umpei Miyamoto
Phys. Rev. D 77, 024026 – Published 15 January 2008

Abstract

We reconsider spherically symmetric black hole solutions in Einstein-Aether theory with the condition that this theory has identical parametrized post-Newtonian parameters as those for general relativity, which is the main difference from the previous research. In contrast with previous study, we allow superluminal propagation of a spin-0 Aether-gravity wave mode. As a result, we obtain black holes having a spin-0 “horizon” inside an event horizon. We allow a singularity at a spin-0 horizon since it is concealed by the event horizon. If we allow such a configuration, the kinetic term of the Aether field can be large enough for black holes to be significantly different from Schwarzschild black holes with respect to Arnowitt-Deser-Misner mass, innermost stable circular orbit, Hawking temperature, and so on. We also discuss whether or not the above features can be seen in more generic vector-tensor theories.

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  • Received 24 September 2007

DOI:https://doi.org/10.1103/PhysRevD.77.024026

©2008 American Physical Society

Authors & Affiliations

Takashi Tamaki* and Umpei Miyamoto

  • Department of Physics, Waseda University, Okubo 3-4-1, Tokyo 169-8555, Japan

  • *tamaki@gravity.phys.waseda.ac.jp
  • umpei@gravity.phys.waseda.ac.jp

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Vol. 77, Iss. 2 — 15 January 2008

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