Possible astrometric discovery of a substellar companion to the closest binary brown dwarf system WISE J104915.57–531906.1

@article{Boffin2014PossibleAD,
  title={Possible astrometric discovery of a substellar companion to the closest binary brown dwarf system WISE J104915.57–531906.1},
  author={H. M. J. Boffin and Dimitri Pourbaix and Koraljka Mu{\vz}i{\'c} and Valentin D. Ivanov and Radostin Kurtev and Yuri Beletsky and A. Mehner and J. P. Berger and Julien H. Girard and Dimitri Mawet},
  journal={Astronomy and Astrophysics},
  year={2014},
  volume={561}
}
Using FORS2 on the Very Large Telescope, we have astrometrically monitored over a period of two months the two components of the brown dwarf system WISE J104915.57-531906.1, the closest one to the Sun. Our astrometric measurements – with a relative precision at the milli-arcsecond scale – allowed us to detect the orbital motion and derive more precisely the parallax of the system, leading to a distance of 2.020 ± 0.019 pc. The relative orbital motion of the two objects is found to be perturbed… 

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