Parallaxes and Proper Motions of Ultracool Brown Dwarfs of Spectral Types Y and Late T

@article{Marsh2013ParallaxesAP,
  title={Parallaxes and Proper Motions of Ultracool Brown Dwarfs of Spectral Types Y and Late T},
  author={Kenneth A. Marsh and Edward L. Wright and J. Davy Kirkpatrick and Christopher Ryan Gelino and Michael C. Cushing and Roger L. Griffith and Michael F. Skrutskie and Peter Eisenhardt},
  journal={The Astrophysical Journal},
  year={2013},
  volume={762},
  pages={119}
}
We present astrometric measurements of 11 nearby ultracool brown dwarfs of spectral types Y and late-T, based on imaging observations from a variety of space-based and ground-based telescopes. These measurements have been used to estimate relative parallaxes and proper motions via maximum likelihood fitting of geometric model curves. To compensate for the modest statistical significance (≲7) of our parallax measurements we have employed a novel Bayesian procedure for distance estimation which… Expand

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