Black hole superradiance in dynamical Chern-Simons gravity

Stephon Alexander, Gregory Gabadadze, Leah Jenks, Nicolás Yunes

Research output: Contribution to journalArticlepeer-review


Black hole superradiance provides a window into the dynamics of light scalar fields and their interactions close to a rotating black hole. Owing to the rotation of the black hole, the amplitude of the scalar field becomes magnified, leading to a "black hole bomb"effect. Recent work has demonstrated that rotating black holes in dynamical Chern-Simons gravity possess unique structures, the "Chern-Simons caps,"which may influence the behavior of matter near the black hole. Motivated by the presence of these caps, we study superradiance in dynamical Chern-Simons gravity in the context of a slowly rotating black hole. We find additional contributions to the superradiance beyond what is expected for a Kerr black hole. Studying the superradiant spectrum of perturbations, we find that the Chern-Simons contributions give rise to small corrections to the angular dependence of the resulting scalar cloud. Finally, we comment on potential observable consequences and future avenues for investigation.

Original languageEnglish (US)
Article number084016
JournalPhysical Review D
Issue number8
StatePublished - Apr 15 2023

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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