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

@article{Malavolta2018AnUP,
  title={An Ultra-short Period Rocky Super-Earth with a Secondary Eclipse and a Neptune-like Companion around K2-141},
  author={Luca Malavolta and Andrew W. Mayo and Tom Louden and Vinesh M. Rajpaul and Aldo Stefano Bonomo and Lars A. Buchhave and Laura Kreidberg and Martti H. K. Kristiansen and Mercedes L{\'o}pez-Morales and Annelies Mortier and Andrew M. Vanderburg and Adrien Coffinet and David Ehrenreich and Christophe Lovis and François Bouchy and David Charbonneau and David R. Ciardi and Andrew Collier Cameron and Rosario Cosentino and Ian J. M. Crossfield and Mario Damasso and Courtney D. Dressing and Xavier Dumusque and Mark E. Everett and Pedro Figueira and Aldo F. Martinez Fiorenzano and Erica J. Gonzales and Rapha{\"e}lle D. Haywood and A. Harutyunyan and Lea A. Hirsch and Steve B. Howell and John Asher Johnson and David W. Latham and Eric D. Lopez and Michel Mayor and Giusi Micela and Emilio Molinari and Valerio Nascimbeni and Francesco A. Pepe and David F. Phillips and Giampaolo Piotto and Ken Rice and Dimitar D. Sasselov and Damien S'egransan and Alessandro Sozzetti and St{\'e}phane Udry and Christopher Watson},
  journal={The Astronomical Journal},
  year={2018},
  volume={155}
}
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… 
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