Zero-Mass Rotating Spacetimes in Four-Dimensional Horava Gravity
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arXiv
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| Format: | Preprint |
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2023
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| _version_ | 1866917294466138112 |
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| author | Park, Mu-In Lee, Hyung Won |
| author_facet | Park, Mu-In Lee, Hyung Won |
| contents | We study a particular exact solution for rotating spacetimes in four-dimensional Horava gravity, which has been proposed as a renormalizable gravity model without the ghost problem. We show that the zero-mass Kerr spacetime or the zero-mass Kerr-(A)dS spacetime in Einstein gravity is an exact solution in four-dimensional Horava for an arbitrary IR Lorentz-violation parameter lambda, but with an appropriate cosmological constant. In particular, for the zero-mass topological Kerr-AdS black hole solution with the hyperbolic horizon topology or the zero-mass Kerr-dS cosmological solution with the spherical horizon topology, there exist the ergosphere and the non-vanishing (positive) Hawking temperature, which imply the existence of negative mass black holes as well as positive mass spacetimes, by losing its mass from the zero-mass ones via the Hawking radiation or Penrose process in the ergosphere. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2309_13859 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Zero-Mass Rotating Spacetimes in Four-Dimensional Horava Gravity Park, Mu-In Lee, Hyung Won High Energy Physics - Theory General Relativity and Quantum Cosmology We study a particular exact solution for rotating spacetimes in four-dimensional Horava gravity, which has been proposed as a renormalizable gravity model without the ghost problem. We show that the zero-mass Kerr spacetime or the zero-mass Kerr-(A)dS spacetime in Einstein gravity is an exact solution in four-dimensional Horava for an arbitrary IR Lorentz-violation parameter lambda, but with an appropriate cosmological constant. In particular, for the zero-mass topological Kerr-AdS black hole solution with the hyperbolic horizon topology or the zero-mass Kerr-dS cosmological solution with the spherical horizon topology, there exist the ergosphere and the non-vanishing (positive) Hawking temperature, which imply the existence of negative mass black holes as well as positive mass spacetimes, by losing its mass from the zero-mass ones via the Hawking radiation or Penrose process in the ergosphere. |
| title | Zero-Mass Rotating Spacetimes in Four-Dimensional Horava Gravity |
| topic | High Energy Physics - Theory General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2309.13859 |