- Main
Testing the gravitational theory with short-period stars around our galactic center
- Hees, A;
- Ghez, AM;
- Do, T;
- Lu, JR;
- Morris, MR;
- Becklin, EE;
- Witzel, G;
- Boehle, A;
- Chappell, S;
- Chen, Z;
- Chu, D;
- Ciurlo, A;
- Dehghanfar, A;
- Gallego-Cano, E;
- Gautam, A;
- Jia, S;
- Kosmo, K;
- Martinez, GD;
- Matthews, K;
- Naoz, S;
- Sakai, S;
- Schödel, R
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.
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