Abstract
We review the Baňados–Teitelboim–Zanelli (BTZ) black hole solution in connection with the spinning string solution. We find a new exact solution, which can be related to the (2 + 1)-dimensional spinning point particle solution. There is no need for a cosmological constant, and so the solution can be up-lifted to (3 + 1) dimensions. The exact solution in a conformally invariant gravity model, where the space–time is written as \(g_{\mu \nu }=\omega ^2 {\tilde{g}}_{\mu \nu }\), is horizon free and has an ergo-circle, while \({\tilde{g}}_{\mu \nu }\) is the BTZ solution. The dilaton \(\omega \) determines the scale of the model. It is conjectured that the conformally invariant non-vacuum BTZ solution will solve the boundary and causality problems which one encounters in spinning cosmic string solutions.
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SLAGTER, R.J. On the BTZ black hole and the spinning cosmic string. J Astrophys Astron 41, 28 (2020). https://doi.org/10.1007/s12036-020-09645-8
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DOI: https://doi.org/10.1007/s12036-020-09645-8