Reexamining the stability of rotating horizonless black shells mimicking Kerr black holes

@article{Danielsson2021ReexaminingTS,
  title={Reexamining the stability of rotating horizonless black shells mimicking Kerr black holes},
  author={Ulf H. Danielsson and Suvendu Giri},
  journal={Physical Review D},
  year={2021}
}
In arXiv:1705.10172 a string theory inspired alternative to gravitational collapse was proposed, consisting of a bubble of AdS space made up of ingredients from string theory. These ultra compact objects are 9/8 times the size of the corresponding Schwarzschild black hole, but being within the photosphere are almost indistinguishable from them. Slowly rotating counterparts of these black shells were constructed in arXiv:1712.00511, which closely mimic a Kerr black hole, but have a quadrupole… 

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