BANYAN. X. Discovery of a wide, low-gravity L-type companion to a fast-rotating M3 dwarf

  title={BANYAN. X. Discovery of a wide, low-gravity L-type companion to a fast-rotating M3 dwarf},
  author={Marie-Eve Desrochers and {\'E}tienne Artigau and Jonathan Gagn'e and Ren{\'e} Doyon and Lison Malo and Jacqueline K. Faherty and David Lafreni{\`e}re},
  journal={arXiv: Solar and Stellar Astrophysics},
We report the discovery of a substellar-mass co-moving companion to 2MASS J22501512+2325342, an M3 candidate member of the young (130--200 Myr) AB Doradus Moving Group (ABDMG). This L3 beta companion was discovered in a 2MASS search for companions at separations of 3--18" from a list of 2 812 stars suspected to be young (< 500 Myr) in the literature, and was confirmed with follow-up astrometry and spectroscopy. Evolutionary models yield a companion mass of 30 (-4,+11) Mj at the age of ABDMG… Expand

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