Slowly rotating black holes in Einstein-æther theory

Barausse, Enrico and Sotiriou, Thomas P. and Vega, Ian (2016) Slowly rotating black holes in Einstein-æther theory. Physical Review D, 93 (4). 44044/1-44044/23. ISSN 2470-0029

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We study slowly rotating, asymptotically flat black holes in Einstein-æther theory and show that solutions that are free from naked finite area singularities form a two-parameter family. These parameters can be thought of as the mass and angular momentum of the black hole, while there are no independent æ ther charges. We also show that the æ ther has nonvanishing vorticity throughout the spacetime, as a result of which there is no hypersurface that resembles the universal horizon found in static, spherically symmetric solutions. Moreover, for experimentally viable choices of the coupling constants, the frame-dragging potential of our solutions only shows percent-level deviations from the corresponding quantities in General Relativity and Hořava gravity. Finally, we uncover and discuss several subtleties in the correspondence between Einstein-æther theory and Hořava gravity solutions in the c ω →∞ limit.

Item Type: Article
Additional Information: ©2016 American Physical Society
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Mathematical Sciences
University of Nottingham, UK > Faculty of Science > School of Physics and Astronomy
Identification Number: 10.1103/PhysRevD.93.044044
Depositing User: Eprints, Support
Date Deposited: 21 Dec 2016 13:39
Last Modified: 18 Oct 2017 16:20

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