Discovery of a Wide Planetary-mass Companion to the Young M3 Star GU Psc

@article{Naud2014DiscoveryOA,
  title={Discovery of a Wide Planetary-mass Companion to the Young M3 Star GU Psc},
  author={Marie-Eve Naud and 'Etienne Artigau and Lison Malo and Loic Albert and Ren{\'e} Doyon and David Lafreni{\`e}re and Jonathan Gagn'e and Didier Saumon and Caroline V. Morley and France Allard and Derek Homeier and Charles A. Beichman and Christopher Ryan Gelino and Anne Boucher},
  journal={The Astrophysical Journal},
  year={2014},
  volume={787},
  pages={5}
}
We present the discovery of a comoving planetary-mass companion ~42" (~2000 AU) from a young M3 star, GU Psc, a likely member of the young AB Doradus Moving Group (ABDMG). The companion was first identified via its distinctively red i − z color (>3.5) through a survey made with Gemini-S/GMOS. Follow-up Canada–France–Hawaii Telescope/WIRCam near-infrared (NIR) imaging, Gemini-N/GNIRS NIR spectroscopy and Wide-field Infrared Survey Explorer photometry indicate a spectral type of T3.5 ± 1 and… 
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