Influence of bulk mass distribution on orbital precession of S2 star in Yukawa gravity

Abstract

In this study we investigate possible applications of observed S2 orbit around Galactic Center for constraining the Yukawa gravity at scales in the range between several tens and several thousands astronomical units (AU) to obtain graviton mass constraints. In our model we suppose that bulk distribution of matter (includes stellar cluster, interstellar gas distribution and dark matter) exists near Supermassive Black Hole (SMBH) in our Galactic Center. We obtain the values of orbital precession angle for different values of mass density of matter and we require that the value of orbital precession is the same like in General Relativity (GR). From that request we determine gravity parameter $\lambda$ and the upper value for graviton mass. We found that in the cases where the density of extended mass is higher, the maximum allowed value for parameter $\lambda$ is smaller and the upper limit for graviton mass is higher. It is due to the fact that the extended mass causes the retrograde orbital precession. We believe that this study is a very efficient tool to evaluate a gravitational potential at the Galactic Center, parameter $\lambda$ of the Yukawa gravity model, and to constrain the graviton mass.

arXiv comment7 pages, 6 figures, 2 tables. Accepted for publication in Eur. Phys. J. D

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• Estimating the parameters of Hybrid Palatini gravity model with the Schwarzschild precession of S2, S38 and S55 stars: case of bulk mass distribution
• Exploring the presence of a fifth force at the Galactic Center
• Constraints on a fifth force from the stellar orbits around the central supermassive black hole of the Milky Way
• Physically viable rotating mass solutions surrounding Kerr black hole
• Crossing the dark matter soliton core: a possible reversed orbital precession