Superradiant Instability and Backreaction of Massive Vector Fields around Kerr Black Holes

William E. East, Frans Pretorius

Research output: Contribution to journalArticle

67 Scopus citations

Abstract

We study the growth and saturation of the superradiant instability of a complex, massive vector (Proca) field as it extracts energy and angular momentum from a spinning black hole, using numerical solutions of the full Einstein-Proca equations. We concentrate on a rapidly spinning black hole (a=0.99) and the dominant m=1 azimuthal mode of the Proca field, with real and imaginary components of the field chosen to yield an axisymmetric stress-energy tensor and, hence, spacetime. We find that in excess of 9% of the black hole's mass can be transferred into the field. In all cases studied, the superradiant instability smoothly saturates when the black hole's horizon frequency decreases to match the frequency of the Proca cloud that spontaneously forms around the black hole.

Original languageEnglish (US)
Article number041101
JournalPhysical review letters
Volume119
Issue number4
DOIs
StatePublished - Jul 24 2017

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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