Horava-Lifshitz gravity: tighter constraints for the Kehagias-Sfetsos solution from new solar system data
Abstract
We analytically work out the perturbation induced by the Kehagias-Sfetsos (KS) space-time solution of the Horava-Lifshitz (HL) modified gravity at long distances on the two-body range for a pair of test particles A and B orbiting the same mass M. We apply our results to the most recently obtained range-residuals \delta\rho for some planets of the solar system (Mercury, Mars, Saturn) ranged from the Earth to effectively constrain the dimensionsless KS parameter \psi_0 for the Sun. We obtain \psi_0 >= 7.2 x 10^-10 (Mercury), \psi_0 >= 9 x 10^-12 (Mars), \psi_0 >= 1.7 x 10^-12 (Saturn). Such lower bounds are tighter than other ones existing in literature by several orders of magnitude. We also preliminarily obtain \psi_0 >= 8 x 10^-10 for the system constituted by the S2 star orbiting the Supermassive Black Hole (SBH) in the center of the Galaxy.
Keywords
Cite
@article{arxiv.1012.2822,
title = {Horava-Lifshitz gravity: tighter constraints for the Kehagias-Sfetsos solution from new solar system data},
author = {Lorenzo Iorio and Matteo Luca Ruggiero},
journal= {arXiv preprint arXiv:1012.2822},
year = {2015}
}
Comments
LaTex2e, 15 pages, 1 table, 3 figures, 31 references. Version matching the one at press in International Journal of Modern Physics D (IJMPD)