Towards constraining of the Horava-Lifshitz gravities
نویسنده
چکیده
Recently a renormalizable model of gravity has been proposed, which may be a UV completion of General Relativity (GR) or its infra-red modification. Although a generic vacuum of the theory is anti-de Sitter one, particulars limit of the theory allow for the Minkowski vacuum. In this limit post-Newtonian coefficients coincide with those of the pure General Relativity. Thus the deviations from the convenient GR can be tested only beyond the post-Newtonian corrections, that is for a system with strong gravity at astrophysical scales. In this letter we consider the potentially observable properties of black holes in the Horava-Lifshitz gravity with Minkowski vacuum: the gravitational lensing and quasinormal modes. We have showed that the bending angle is seemingly smaller in the considered Horava-Lifshitz gravity than in GR. The quasinormal modes of black holes are longer lived and have larger real oscillation frequency in the Horava-Lifshitz gravity than in GR. These corrections should be observable in the near future experiments on lensing and gravitational antennas, helping to constrain parameters in the Horava-Lifshitz gravity.
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