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Paper   IPM / Physic / 15480
School of Physics
  Title:   Extremal Vanishing Horizon Kerr-AdS Black Holes at Ultraspinning Limit
1.  S.M. Noorbakhsh
2.  M.H. Vahidinia
  Status:   Published
  Journal: JHEP
  Vol.:  1801
  Year:  2018
  Pages:   042
  Supported by:  IPM
By utilizing the ultraspinning limit we generate a new class of extremal vanishing horizon (EVH) black holes in odd dimensions (d - 5). 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 6= r+) = const. slices. We also demonstrate the near horizon geometries of obtained ultraspinning EVH solutions contain an AdS3 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 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 2d dual CFT and Bekenstein-Hawking entropy are equivalent

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