Shadows and deflection angle of charged and slowly rotating black holes in Einstein-Æther theory
By Tao Zhu, Qiang Wu, M. Jamil, K. Jusufi. Physical Review D, 2019
135 citations recorded by the source corpus.
In this paper, we study the shadow cast by two types of charged and slowly rotating black holes in the Einstein-AEther theory of gravity. These two types of black holes correspond to two specific combinations of the coupling constants of the aether field, i.e., c14=0 but c123≠0 for the first type and c123=0 for the second type. For both types of black holes, in addition to the mass and charge of the black holes, we show that the presence of the aether field can also affect the size of the shadow. For the first type of black hole, it is shown that the shadow size increases with the parameter c13, while for the second type of black hole, the shadow size still increases with c13 but decreases with the parameter c14. With these properties of the aether parameters, we also discuss the observational constraints on these parameters by using the data of the first black hole image by the Event Horizon Telescope. In addition, we also explore the effect of the aether field on the deflection angle of light and the time delay by using the Gauss-Bonnet theorem. It is shown that, for a specific combination c123=0, the deflection angle/time delay is slightly affected by the aether parameter c13 at the leading order.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/0f6b02e2f9dfe8a04c27ae1414410fd87f0f2e9f
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Citations in the corpus
- Black holes with scalar hair in light of the Event Horizon Telescope (2020, background): “For an incomplete list of works in this direction, see for instance [115–167].”
- Magnetically charged black holes from non-linear electrodynamics and the Event Horizon Telescope (2019, unknown): “[32–72].”