The Discovery of the Long-Period, Eccentric Planet Kepler-88 d and System Characterization with Radial Velocities and Photodynamical Analysis

@article{Weiss2020TheDO,
  title={The Discovery of the Long-Period, Eccentric Planet Kepler-88 d and System Characterization with Radial Velocities and Photodynamical Analysis},
  author={Lauren M. Weiss and Daniel C. Fabrycky and Eric Agol and Sean M. Mills and Andrew W. Howard and Howard T. Isaacson and Erik A. Petigura and Benjamin J. Fulton and Lea A. Hirsch and Evan Sinukoff},
  journal={The Astronomical Journal},
  year={2020},
  volume={159}
}
We present the discovery of Kepler-88 d ( , , ) based on six years of radial velocity (RV) follow-up from the W. M. Keck Observatory High Resolution Echelle Spectrometer spectrograph. Kepler-88 has two previously identified planets. Kepler-88 b (KOI-142.01) transits in the NASA Kepler photometry and has very large transit timing variations (TTVs). Nesvorný et al. performed a dynamical analysis of the TTVs to uniquely identify the orbital period and mass of the perturbing planet (Kepler-88 c… 
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