Spinning generalizations of Majumdar-Papapetrou multi-black hole spacetimes: light rings, lensing and shadows
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arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866916595508445184 |
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| author | Moreira, Zeus S. Herdeiro, Carlos A. R. Crispino, Luís C. B. |
| author_facet | Moreira, Zeus S. Herdeiro, Carlos A. R. Crispino, Luís C. B. |
| contents | A generalization of the Majumdar-Papapetrou multi-black hole spacetime was recently constructed by Teo and Wan [1], describing charged and spinning (extremal) balanced black holes in asymptotically flat spacetime. We explore the dynamics of null geodesics on this geometry, focusing on the two-center solution. Using the topological charge formalism, we show that various light ring arrangements arise from different choices of individual angular momenta: light rings with opposite topological charges can merge and annihilate each other, resulting in configurations with a total of 4, 6, or 8 light rings. Using backward ray-tracing, we obtained the shadow and lensing of these spacetimes. The former, in particular, closely resembles those for the double-Kerr metric. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_01759 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Spinning generalizations of Majumdar-Papapetrou multi-black hole spacetimes: light rings, lensing and shadows Moreira, Zeus S. Herdeiro, Carlos A. R. Crispino, Luís C. B. General Relativity and Quantum Cosmology A generalization of the Majumdar-Papapetrou multi-black hole spacetime was recently constructed by Teo and Wan [1], describing charged and spinning (extremal) balanced black holes in asymptotically flat spacetime. We explore the dynamics of null geodesics on this geometry, focusing on the two-center solution. Using the topological charge formalism, we show that various light ring arrangements arise from different choices of individual angular momenta: light rings with opposite topological charges can merge and annihilate each other, resulting in configurations with a total of 4, 6, or 8 light rings. Using backward ray-tracing, we obtained the shadow and lensing of these spacetimes. The former, in particular, closely resembles those for the double-Kerr metric. |
| title | Spinning generalizations of Majumdar-Papapetrou multi-black hole spacetimes: light rings, lensing and shadows |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2502.01759 |