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Slowly rotating black holes in Einstein-æther theory

Barausse, Enrico; Sotiriou, Thomas P.; Vega, Ian


Enrico Barausse

Professor of Gravitational Physics

Ian Vega


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.


Barausse, E., Sotiriou, T. P., & Vega, I. (2016). Slowly rotating black holes in Einstein-æther theory. Physical Review D, 93(4), Article 44044.

Journal Article Type Article
Acceptance Date Dec 31, 2015
Publication Date Feb 16, 2016
Deposit Date Dec 21, 2016
Publicly Available Date Dec 21, 2016
Journal Physical Review D
Print ISSN 2470-0010
Electronic ISSN 2470-0029
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 93
Issue 4
Article Number 44044
Public URL
Publisher URL
Additional Information ©2016 American Physical Society


Black hole PhysRevD.93.044044 (002).pdf (802 Kb)

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