Relativistic effects in orbital motion of the S-stars at the Galactic Center

Abstract

The Galactic Center star cluster, known as S-stars, is a perfect source of relativistic phenomena observations. The stars are located in the strong field of relativistic compact object Sgr A* and are moving with very high velocities at pericenters of their orbits. In this work we consider motion of several S-stars by using the Parameterized Post-Newtonian (PPN) formalism of General Relativity (GR) and Post-Newtonian (PN) equations of motion of the Feynman's quantum-field gravity theory, where the positive energy density of the gravity field can be measured via the relativistic pericenter shift. The PPN parameters $\beta$ and $\gamma$ are constrained using the S-stars data. The positive value of the $T_g^{00}$ component of the gravity energy-momentum tensor is confirmed for condition of S-stars motion.

Accepted for publication in the journal Universe, 08.10.2020

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Cited by in corpus (3)

• Estimating the Parameters of Extended Gravity Theories with the Schwarzschild Precession of S2 Star
• Estimating the parameters of Hybrid Palatini gravity model with the Schwarzschild precession of S2, S38 and S55 stars: case of bulk mass distribution
• Constraints on a fifth force from the stellar orbits around the central supermassive black hole of the Milky Way