Testing the gravitational theory with short-period stars around our Galactic Center
Abstract
Motion of short-period stars orbiting the supermassive black hole in our Galactic Center has been monitored for more than 20 years. These observations are currently offering a new way to test the gravitational theory in an unexplored regime: in a strong gravitational field, around a supermassive black hole. In this proceeding, we present three results: (i) a constraint on a hypothetical fifth force obtained by using 19 years of observations of the two best measured short-period stars S0-2 and S0-38 ; (ii) an upper limit on the secular advance of the argument of the periastron for the star S0-2 ; (iii) a sensitivity analysis showing that the relativistic redshift of S0-2 will be measured after its closest approach to the black hole in 2018.
Keywords
Cite
@article{arxiv.1705.10792,
title = {Testing the gravitational theory with short-period stars around our Galactic Center},
author = {A. Hees and A. M. Ghez and T. Do and J. R. Lu and M. R. Morris and E. E. Becklin and G. Witzel and A. Boehle and S. Chappell and Z. Chen and D. Chu and A. Ciurlo and A. Dehghanfar and E. Gallego-Cano and A. Gautam and S. Jia and K. Kosmo and G. D. Martinez and K. Matthews and S. Naoz and S. Sakai and R. Schödel},
journal= {arXiv preprint arXiv:1705.10792},
year = {2017}
}
Comments
4 pages, 2 figures, proceedings of the 52nd Rencontres de Moriond, Gravitation Session