Can I read Re-examining the stability of rotating horizonless black shells mimicking Kerr black holes on EtoBox?

Re-examining the stability of rotating horizonless black shells mimicking Kerr black holes by Danielsson, Ulf; Giri, Suvendu is a scholarly article available to read on EtoBox.

What is Re-examining the stability of rotating horizonless black shells mimicking Kerr black holes about?

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 moment that differs from Kerr. Recently, arXiv:2109.09814 studied the dynamical stability of the stationary black shells against radial perturbations and accretion of matter, and examined a two parameter family of fluxes required for stability. In this paper, we re-examine the rotating black shells with particular attention to the constraints imposed by this dynamical analysis for non-rotating shells. Extrapolating these results to rotating shells, we find that they can indeed support themselves at a critical point in the gravitational potential. Additionally, requiring that they settle back to their new Buchdahl radius after accreting matter, uniquely fixes the fluxes required for dynamical

Author

Danielsson, Ulf; Giri, Suvendu

Published

2021

Language

EN