Trapped photon region in the phase space of sub-extremal Kerr-Newman and Kerr-Sen spacetimes
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866915773933420544 |
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| author | Cederbaum, Carla Mosani, Karim |
| author_facet | Cederbaum, Carla Mosani, Karim |
| contents | We analyse the geometry and topology of the trapped photon region in the domain of outer communication of sub-extremal Kerr-Newman and Kerr-Sen spacetimes. Specifically, we show that its projection to the (co-)tangent bundle forms a five-dimensional submanifold with topology $SO(3)\times \mathbb{R}^2$ in each setup. The proof adapts the method of Cederbaum and Jahns for sub-extremal Kerr spacetime. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_04502 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Trapped photon region in the phase space of sub-extremal Kerr-Newman and Kerr-Sen spacetimes Cederbaum, Carla Mosani, Karim General Relativity and Quantum Cosmology We analyse the geometry and topology of the trapped photon region in the domain of outer communication of sub-extremal Kerr-Newman and Kerr-Sen spacetimes. Specifically, we show that its projection to the (co-)tangent bundle forms a five-dimensional submanifold with topology $SO(3)\times \mathbb{R}^2$ in each setup. The proof adapts the method of Cederbaum and Jahns for sub-extremal Kerr spacetime. |
| title | Trapped photon region in the phase space of sub-extremal Kerr-Newman and Kerr-Sen spacetimes |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2602.04502 |