Axion hair for Kerr black holes

Bruce A. Campbell, M. J. Duncan, Nemanja Kaloper, Keith A. Olive

Research output: Contribution to journalArticlepeer-review

82 Scopus citations


We consider axion fields with Lorentz Chern-Simons coupling to gravity. In Kerr black hole background metrics this coupling gives a non-vanishing source term for the axion field. For the case of a slowly rotating black hole, we explicitly calculate the long range axion field strength "hair" produced. We believe that this represents the first known example of stable, dynamical, non-gauge "hair" exhibited by a black hole.

Original languageEnglish (US)
Pages (from-to)34-38
Number of pages5
JournalPhysics Letters B
Issue number1
StatePublished - Nov 8 1990


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