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arXiv · 1708.08654

Extremal Vanishing Horizon Kerr-AdS Black Holes at Ultraspinning Limit

S. M. Noorbakhsh·M. H. Vahidinia
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Abstract

By utilizing the ultraspinning limit we generate a new class of extremal vanishing horizon (EVH) black holes in odd dimensions ($d\geq5$). Starting from the general multi-spinning Kerr-AdS metrics, we show the EVH limit commutes with the ultraspinning limit, in which the resulting solutions possess a non-compact but finite area manifold for all $(t,r\neq r_+)=const.$ slices. We also demonstrate the near horizon geometries of obtained ultraspinning EVH solutions contain an AdS$_3$ throats, where it would be a BTZ black hole in the near EVH cases. The commutativity of the ultraspinning and near horizon limits for EVH solutions is confirmed as well. Furthermore, we discuss only the five-dimensional case near the EVH point can be viewed as a super-entropic black hole. We also show that the thermodynamics of the obtained solutions agree with the BTZ black hole. Moreover we investigate the EVH/CFT proposal, demonstrating the entropy of $2$d dual CFT and Bekenstein-Hawking entropy are equivalent.

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S. M. Noorbakhsh, M. H. Vahidinia. 2019-04-06. Extremal Vanishing Horizon Kerr-AdS Black Holes at Ultraspinning Limit. https://doi.org/10.1007/jhep01(2018)042

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