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PreprintarXiv licencearXiv

Distorting Kerr Images with Parity-Odd Scalar Hair

  • Qian Wan
  • Yehui Hou
  • Yang Huang
  • Peng-Cheng Li
  • Minyong Guo
  • Bin Chen
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Abstract

We investigate thin-disk imaging of Kerr black holes with synchronized scalar hair, focusing on backreacted parity-odd excited states of a complex scalar field minimally coupled to Einstein gravity. The spacetime displays a core-double-torus lensing structure, with a central black hole surrounded by two scalar clouds. We study the dependence of the images on hair strength and viewing angle, identifying a weak-hair regime close to Kerr. With increasing hair, the photon ring and shadow region shrink and become more distorted. In the strong-hair regime, gravitational lensing produces new features, including multiple disconnected shadow components, crescent-shaped structures, and signatures of chaotic lensing. For nearly edge-on viewing angles, repeated equatorial crossings generate nested ring-like patterns. These results highlight possible geometric signatures of black holes with excited scalar hair.

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Cite

BibTeXRIS
BibTeX
@misc{wan2026distorting,
  title = {{Distorting Kerr Images with Parity-Odd Scalar Hair}},
  author = {Qian Wan and Yehui Hou and Yang Huang and Peng-Cheng Li and Minyong Guo and Bin Chen},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2605.28376},
  eprint = {2605.28376},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.28376},
}
RIS
TY  - UNPB
TI  - Distorting Kerr Images with Parity-Odd Scalar Hair
AU  - Qian Wan
AU  - Yehui Hou
AU  - Yang Huang
AU  - Peng-Cheng Li
AU  - Minyong Guo
AU  - Bin Chen
PY  - 2026
DA  - 2026/09/16
PB  - arXiv
DO  - 10.48550/arxiv.2605.28376
UR  - https://arxiv.org/abs/2605.28376
AB  - We investigate thin-disk imaging of Kerr black holes with synchronized scalar hair, focusing on backreacted parity-odd excited states of a complex scalar field minimally coupled to Einstein gravity. The spacetime displays a core-double-torus lensing structure, with a central black hole surrounded by two scalar clouds. We study the dependence of the images on hair strength and viewing angle, identifying a weak-hair regime close to Kerr. With increasing hair, the photon ring and shadow region shrink and become more distorted. In the strong-hair regime, gravitational lensing produces new features, including multiple disconnected shadow components, crescent-shaped structures, and signatures of chaotic lensing. For nearly edge-on viewing angles, repeated equatorial crossings generate nested ring-like patterns. These results highlight possible geometric signatures of black holes with excited scalar hair.
ER  -