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Constraining a Companion of the Galactic Center Black Hole Sgr A*

Constraining a Companion of the Galactic Center Black Hole Sgr A*

Abstract We use 23 yr of astrometric and radial velocity data on the orbit of the star S0-2 to constrain a hypothetical intermediate-mass black hole orbiting the massive black hole Sgr A* at the Galactic center. The data place upper limits on variations of the orientation of the stellar orbit …