Generalized near horizon extreme binary black hole geometry

Jacob Ciafre, Shahar Hadar, Erin Rickenbach, Maria J. Rodriguez

Research output: Contribution to journalArticlepeer-review


We present a new vacuum solution of Einstein's equations describing the near horizon region of two neutral, extreme (zero-temperature), corotating, nonidentical Kerr black holes. The metric is stationary, asymptotically near horizon extremal Kerr (NHEK), and contains a localized massless strut along the symmetry axis between the black holes. In the deep infrared, it flows to two separate throats which we call "pierced-NHEK" geometries: each throat is NHEK pierced by a conical singularity. We find that in spite of the presence of the strut for the pierced-NHEK geometries the isometry group SL(2,R)×U(1) is restored. We find the physical parameters and entropy.

Original languageEnglish
Article number044033
JournalPhysical Review D
Issue number4
StatePublished - 15 Aug 2019
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2019 authors. Published by the American Physical Society.

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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