Monitoring stellar orbits around the Massive Black Hole in the Galactic Center

  title={Monitoring stellar orbits around the Massive Black Hole in the Galactic Center},
  author={S. Gillessen and F. Eisenhauer and S. Trippe and T. Alexander and R. Genzel and F. Martins and T. Ott},
  journal={The Astrophysical Journal},
We present the results of 16 years of monitoring stellar orbits around the massive black hole in the center of the Milky Way, using high-resolution near-infrared techniques. This work refines our previous analysis mainly by greatly improving the definition of the coordinate system, which reaches a long-term astrometric accuracy of 300 μas, and by investigating in detail the individual systematic error contributions. The combination of a long-time baseline and the excellent astrometric accuracy… Expand
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