WASP-47: A HOT JUPITER SYSTEM WITH TWO ADDITIONAL PLANETS DISCOVERED BY K2

@article{Becker2015WASP47AH,
  title={WASP-47: A HOT JUPITER SYSTEM WITH TWO ADDITIONAL PLANETS DISCOVERED BY K2},
  author={Juliette C. Becker and Andrew M. Vanderburg and Fred C. Adams and Saul A. Rappaport and Hans M. Schwengeler},
  journal={The Astrophysical Journal Letters},
  year={2015},
  volume={812}
}
Using new data from the K2 mission, we show that WASP-47, a previously known hot Jupiter host, also hosts two additional transiting planets: a Neptune-sized outer planet and a super-Earth inner companion. We measure planetary properties from the K2 light curve and detect transit timing variations (TTVs), confirming the planetary nature of the outer planet. We performed a large number of numerical simulations to study the dynamical stability of the system and to find the theoretically expected… 
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