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PreprintCC BY 4.0arXiv

On the Extended Kerr-Newman-Bertotti-Robinson Spacetime: Two Black Holes and a Naked Singularity in Bertotti-Robinson Universe

  • Yu-Sen Zhou
  • Wen-Tao Fu
  • Li-Ming Cao
  • Rong-Gen Cai
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Abstract

We introduce new coordinates that extend the Kerr--Newman--Bertotti--Robinson spacetime consistently with the previous reciprocal continuation. In these coordinates, the two points at Ω=0 are resolved into complete Bertotti--Robinson null infinities. The extended spacetime describes two black holes sharing a common exterior of nontrivial topology, together with a naked ring singularity. In the regular static limit, the new coordinates globally identify the spacetime with the balanced Alekseev--García geometry.

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Cite

BibTeXRIS
BibTeX
@misc{zhou2026extended,
  title = {{On the Extended Kerr-Newman-Bertotti-Robinson Spacetime: Two Black Holes and a Naked Singularity in Bertotti-Robinson Universe}},
  author = {Yu-Sen Zhou and Wen-Tao Fu and Li-Ming Cao and Rong-Gen Cai},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.20626},
  eprint = {2609.20626},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.20626},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - On the Extended Kerr-Newman-Bertotti-Robinson Spacetime: Two Black Holes and a Naked Singularity in Bertotti-Robinson Universe
AU  - Yu-Sen Zhou
AU  - Wen-Tao Fu
AU  - Li-Ming Cao
AU  - Rong-Gen Cai
PY  - 2026
DA  - 2026/09/17
PB  - arXiv
DO  - 10.48550/arxiv.2609.20626
UR  - https://arxiv.org/abs/2609.20626
AB  - We introduce new coordinates that extend the Kerr--Newman--Bertotti--Robinson spacetime consistently with the previous reciprocal continuation. In these coordinates, the two points at Ω=0 are resolved into complete Bertotti--Robinson null infinities. The extended spacetime describes two black holes sharing a common exterior of nontrivial topology, together with a naked ring singularity. In the regular static limit, the new coordinates globally identify the spacetime with the balanced Alekseev--García geometry.
ER  -