Constraining MOdified Gravity with the S2 Star

Abstract

We have used publicly available kinematic data for the S2 star to constrain the parameter space of MOdified Gravity. Integrating geodesics and using a Markov Chain Monte Carlo algorithm we have provided with the first constraint on the scales of the Galactic Centre for the parameter $\alpha$ of the theory, which represents the fractional increment of the gravitational constant $G$ with respect to its Newtonian value. Namely, $\alpha \lesssim 0.662$ at 99.7% confidence level (where $\alpha =0$ reduces the theory to General Relativity).

Proceeding of the conference Alternative Gravities and Fundamental Cosmology (ALTECOSMOFUN'21)

References in corpus (10)

• Detection of the Schwarzschild precession in the orbit of the star S2 near the Galactic centre massive black hole
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Cited by in corpus (4)

• Constraints on Yukawa gravity parameters from observations of bright stars
• Testing Born-Infeld $f(T)$ teleparallel gravity through Sgr A${}^{\star }$ observations
• Gravitational synchrotron radiation and Penrose process in STVG theory
• Constraining a disformal Schwarzschild black hole in DHOST theories with the orbit of the S2 star