The Ma-Lü background spacetime is an electrovacuum Kundt spacetime of type D with electric or magnetic charge, identified via algebraic classification and explicit coordinate transformations.
New Rotating Black Hole in Electromagnetic Fields: Cosmological Horizon without Cosmological Constant
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abstract
We obtain a new electrovacuum and related background spacetime that contains a cosmological horizon supported entirely by the electromagnetic field. We further construct an exact solution describing a Kerr black hole in this background. We study the global structure including horizons and singularities, and derive the first law of black hole thermodynamics. The emergence of a cosmological horizon in Einstein-Maxwell gravity without invoking a positive cosmological constant or dark energy is tantalizing, and may provide a new avenue for exploring cosmological and astrophysical phenomena related to black holes and the late-time cosmology.
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2026 1verdicts
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Comment on the "New Rotating Black Hole in Electromagnetic Fields: Cosmological Horizon without Cosmological Constant''
The Ma-Lü background spacetime is an electrovacuum Kundt spacetime of type D with electric or magnetic charge, identified via algebraic classification and explicit coordinate transformations.