Static Black Binaries in de Sitter

Benson Way; Gary W. Gibbons; Jorge E. Santos; Oscar J.C. Dias

Static Black Binaries in de Sitter

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arxiv 2303.07361 v2 pith:BYKR4JVB submitted 2023-03-13 gr-qc astro-ph.HEhep-th

Oscar J.C. Dias , Gary W. Gibbons , Jorge E. Santos , Benson Way This is my paper · ORCID

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keywords staticbinariesblackfirstfour-dimensionalgeneralrelativitysolution

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We construct the first four-dimensional multi-black hole solution of general relativity with a positive cosmological constant. The solution consists of two static black holes whose gravitational attraction is balanced by the cosmic expansion. These static binaries provide the first four-dimensional example of non-uniqueness in general relativity without matter.

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Spinning generalizations of Majumdar-Papapetrou multi-black hole spacetimes: light rings, lensing and shadows
gr-qc 2025-02 conditional novelty 6.0 of 10

For the Teo-Wan two-black-hole spacetime, light rings merge and annihilate in pairs, giving total counts of 4, 6, or 8, and the shadows mimic double-Kerr.

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