An Ultra-short Period Rocky Super-Earth with a Secondary Eclipse and a Neptune-like Companion around K2-141

  title={An Ultra-short Period Rocky Super-Earth with a Secondary Eclipse and a Neptune-like Companion around K2-141},
  author={L. Malavolta and A. Mayo and T. Louden and V. Rajpaul and A. Bonomo and L. Buchhave and L. Kreidberg and M. H. Kristiansen and M. L{\'o}pez-Morales and A. Mortier and A. Vanderburg and A. Coffinet and D. Ehrenreich and C. Lovis and F. Bouchy and D. Charbonneau and D. Ciardi and A. Cameron and R. Cosentino and I. Crossfield and M. Damasso and C. Dressing and X. Dumusque and M. Everett and P. Figueira and A. Fiorenzano and E. Gonzales and R. Haywood and A. Harutyunyan and L. Hirsch and S. Howell and J. Johnson and D. Latham and E. Lopez and M. Mayor and G. Micela and E. Molinari and V. Nascimbeni and F. Pepe and D. Phillips and G. Piotto and K. Rice and D. Sasselov and D. S'egransan and A. Sozzetti and S. Udry and C. Watson},
  journal={The Astronomical Journal},
Ultra-short period (USP) planets are a class of low-mass planets with periods shorter than one day. Their origin is still unknown, with photo-evaporation of mini-Neptunes and in situ formation being the most credited hypotheses. Formation scenarios differ radically in the predicted composition of USP planets, and it is therefore extremely important to increase the still limited sample of USP planets with precise and accurate mass and density measurements. We report here the characterization of… Expand
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