AN IMPROVED DISTANCE AND MASS ESTIMATE FOR SGR A* FROM A MULTISTAR ORBIT ANALYSIS

@article{Boehle2016ANID,
  title={AN IMPROVED DISTANCE AND MASS ESTIMATE FOR SGR A* FROM A MULTISTAR ORBIT ANALYSIS},
  author={Anna Boehle and Andrea M. Ghez and Rainer Sch{\"o}del and Leonhard Meyer and S. Yelda and Saundra M Albers and Gregory D Martinez and Eric Edward Becklin and Tuan Do and J. R. Lu and Keith Y. Matthews and Mark R. Morris and Breann N. Sitarski and Gunther Witzel},
  journal={The Astrophysical Journal},
  year={2016},
  volume={830}
}
We present new, more precise measurements of the mass and distance of our Galaxy’s central supermassive black hole, Sgr A*. These results stem from a new analysis that more than doubles the time baseline for astrometry of faint stars orbiting Sgr A*, combining 2 decades of speckle imaging and adaptive optics data. Specifically, we improve our analysis of the speckle images by using information about a star’s orbit from the deep adaptive optics data (2005–2013) to inform the search for the star… 

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