A geometric distance measurement to the Galactic Center black hole with 0.3% uncertainty

  title={A geometric distance measurement to the Galactic Center black hole with 0.3% uncertainty},
  author={R. Abuter and A. Amorim and M. Bauboeck and J. P. Berger and H. Bonnet and W. Brandner and Y. Cl'enet and V. C. D. Foresto and P. Zeeuw and J. Dexter and G. Duvert and A. Eckart and F. Eisenhauer and N. F. Schreiber and P. Garc{\'i}a and F. Gao and E. Gendron and R. Genzel and O. Gerhard and S. Gillessen and M. Habibi and X. Haubois and T. Henning and S. Hippler and M. Horrobin and A. Jim'enez-Rosales and L. Jocou and P. Kervella and S. Lacour and V. Lapeyr{\`e}re and J. Bouquin and P. L{\'e}na and T. Ott and T. Paumard and K. Perraut and G. Perrin and O. Pfuhl and S. Rabien and G. R. Coira and G. Rousset and S. Scheithauer and A. Sternberg and O. Straub and C. Straubmeier and E. Sturm and L. Tacconi and F. Vincent and S. V. Fellenberg and I. Waisberg and F. Widmann and E. Wieprecht and E. Wiezorrek and J. Woillez and S. Yazici},
  journal={arXiv: Astrophysics of Galaxies},
  • R. Abuter, A. Amorim, +51 authors S. Yazici
  • Published 2019
  • Physics
  • arXiv: Astrophysics of Galaxies
  • We present a 0.16% precise and 0.27% accurate determination of R0, the distance to the Galactic Center. Our measurement uses the star S2 on its 16-year orbit around the massive black hole Sgr A* that we followed astrometrically and spectroscopically for 27 years. Since 2017, we added near-infrared interferometry with the VLTI beam combiner GRAVITY, yielding a direct measurement of the separation vector between S2 and Sgr A* with an accuracy as good as 20 micro-arcsec in the best cases. S2… CONTINUE READING
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