Another Superdense Sub-Neptune in K2-182 b and Refined Mass Measurements for K2-199 b and c

  title={Another Superdense Sub-Neptune in K2-182 b and Refined Mass Measurements for K2-199 b and c},
  author={Joseph M. Akana Murphy and Molly R. Kosiarek and Natalie M. Batalha and Erica J. Gonzales and Howard T. Isaacson and Erik A. Petigura and Lauren M. Weiss and Samuel K. Grunblatt and David R. Ciardi and Benjamin J. Fulton and Lea A. Hirsch and Aida Behmard and Lee J. Rosenthal},
  journal={The Astronomical Journal},
We combine multiple campaigns of K2 photometry with precision radial velocity measurements from Keck-HIRES to measure the masses of three sub-Neptune-sized planets. We confirm the planetary nature of the massive sub-Neptune K2-182 b (P b = 4.7 days, R b = 2.69 R ⊕) and derive refined parameters for K2-199 b and c (P b = 3.2 days, R b = 1.73 R ⊕ and P c = 7.4 days, R c = 2.85 R ⊕). These planets provide valuable data points in the mass–radius plane, especially as TESS continues to reveal an… 


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