Three Red Suns in the Sky: A Transiting, Terrestrial Planet in a Triple M Dwarf System at 6.9 Parsecs

  title={Three Red Suns in the Sky: A Transiting, Terrestrial Planet in a Triple M Dwarf System at 6.9 Parsecs},
  author={J. Winters and A. Medina and J. Irwin and D. Charbonneau and N. Astudillo-Defru and E. Horch and J. Eastman and E. Vrijmoet and T. Henry and Hannah Diamond-Lowe and E. Winston and X. Bonfils and G. Ricker and R. Vanderspek and D. Latham and S. Seager and J. Winn and J. Jenkins and S. Udry and D. Twicken and J. Teske and P. Tenenbaum and F. Pepe and F. Murgas and P. Muirhead and J. Mink and C. Lovis and A. Levine and S. L'epine and W. Jao and C. Henze and G. Fur'esz and T. Forveille and P. Figueira and G. Esquerdo and C. Dressing and R. D'iaz and X. Delfosse and C. Burke and F. Bouchy and P. Berlind and J. Almenara},
  journal={arXiv: Earth and Planetary Astrophysics},
We present the discovery from TESS data of LTT 1445Ab. At a distance of 6.9 parsecs, it is the second nearest transiting exoplanet system found to date, and the closest one known for which the primary is an M dwarf. The host stellar system consists of three mid-to-late M dwarfs in a hierarchical configuration, which are blended in one TESS pixel. We use data from MEarth and results from the SPOC DV report to determine that the planet transits the primary star in the system. The planet has a… Expand
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