A rainbow-deformed McVittie spacetime with one energy history reduces exactly to standard McVittie dynamics, and a linear late-time rainbow closure fitted to 32 cosmic chronometers and 1580 Pantheon+ supernovae is consistent with the general-relativistic limit.
Remnants of Black Rings from Gravity's Rainbow
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abstract
In this paper, we investigate a spinning black ring and a charged black ring in the context of gravity's rainbow. By incorporating rainbow functions proposed by Amelino-Camelia, et al. in [arXiv:hep-th/9605211, arXiv:0806.0339v2] in the metric of the black rings, a considerable modification happens to their thermodynamical properties. We calculate corrections to the temperature, entropy and heat capacity of the black rings. These calculations demonstrate that the behavior of Hawking radiation changes considerably near the Planck scale in gravity's rainbow, where it is shown that black rings do not evaporate completely and a remnant is left as the black rings evaporate down to Planck scale.
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2026 1verdicts
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Rainbow McVittie Horizons in an Expanding Universe
A rainbow-deformed McVittie spacetime with one energy history reduces exactly to standard McVittie dynamics, and a linear late-time rainbow closure fitted to 32 cosmic chronometers and 1580 Pantheon+ supernovae is consistent with the general-relativistic limit.