SDSS J111010.01+011613.1: A New Planetary-Mass T Dwarf Member of the AB Doradus Moving Group

  title={SDSS J111010.01+011613.1: A New Planetary-Mass T Dwarf Member of the AB Doradus Moving Group},
  author={Jonathan Gagn'e and Adam J. Burgasser and Jacqueline K. Faherty and David Lafreni{\`e}re and Ren{\'e} Doyon and Joseph C. Filippazzo and Emily C. Bowsher and Christine P. Nicholls},
  journal={arXiv: Solar and Stellar Astrophysics},
We present a new radial velocity measurement that, together with a trigonometric parallax, proper motion and signs of low gravity from the literature, confirms that SDSS J111010.01+011613.1 is a new T5.5 bona fide member of AB Doradus. Fitting $\lambda/\Delta\lambda$ $\approx$ 6000 FIRE spectroscopy in the 1.20-1.33 $\mu$m region to BT-Settl atmosphere models yielded a radial velocity of $7.5 \pm 3.8$ km s$^{-1}$. At such a young age (110-130 Myr), current evolution models predict a mass of… 

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