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Journal Article

#### Generalized Near Horizon Extreme Binary Black Hole Geometry

##### External Ressource

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##### Fulltext (public)

1906.07203.pdf

(Preprint), 802KB

PhysRevD.100.044033.pdf

(Publisher version), 535KB

##### Supplementary Material (public)

There is no public supplementary material available

##### Citation

Ciafre, J., Hadar, S., Rickenbach, E., & Rodriguez, M. J. (2019). Generalized Near
Horizon Extreme Binary Black Hole Geometry.* Physical Review D,* *100*(4):
044033. doi:10.1103/PhysRevD.100.044033.

Cite as: http://hdl.handle.net/21.11116/0000-0003-FDDE-7

##### Abstract

We present a new vacuum solution of Einstein's equations describing the near
horizon region of two neutral, extreme (zero-temperature), co-rotating,
non-identical 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)xU(1) is
restored. We find the physical parameters and entropy.