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Deformation of extremal black holes from stringy interactions

Chen, Baoyi and Stein, Leo C. (2018) Deformation of extremal black holes from stringy interactions. Physical Review D, 97 (8). Art. No. 084012. ISSN 2470-0010. doi:10.1103/PhysRevD.97.084012.

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Black holes are a powerful setting for studying general relativity and theories beyond GR. However, analytical solutions for rotating black holes in beyond-GR theories are difficult to find because of the complexity of such theories. In this paper, we solve for the deformation to the near-horizon extremal Kerr metric due to two example string-inspired beyond-GR theories: Einstein-dilaton-Gauss-Bonnet and dynamical Chern-Simons theory. We accomplish this by making use of the enhanced symmetry group of NHEK and the weak-coupling limit of EdGB and dCS. We find that the EdGB metric deformation has a curvature singularity, while the dCS metric is regular. From these solutions, we compute orbital frequencies, horizon areas, and entropies. This sets the stage for analytically understanding the microscopic origin of black hole entropy in beyond-GR theories.

Item Type:Article
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URLURL TypeDescription Paper
Stein, Leo C.0000-0001-7559-9597
Additional Information:© 2018 American Physical Society. (Received 5 February 2018; published 9 April 2018) The authors would like to thank Yanbei Chen, Jutta Kunz, Yiqiu Ma, Zachary Mark, Marika Taylor, Nicolás Yunes, Peter Zimmerman, and an anonymous referee for useful conversations. L. C. S. acknowledges the support of National Science Foundation Grant No. PHY–1404569, and both authors acknowledge the support of the Brinson Foundation. Some calculations used the computer algebra system Mathematica, in combination with the xAct/xTensor suite [42,43].
Group:TAPIR, Walter Burke Institute for Theoretical Physics
Funding AgencyGrant Number
Brinson FoundationUNSPECIFIED
Issue or Number:8
Record Number:CaltechAUTHORS:20180409-160805020
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85700
Deposited By: George Porter
Deposited On:09 Apr 2018 23:18
Last Modified:15 Nov 2021 20:31

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