A ~7.5 M⊕ Planet Orbiting the Nearby Star, GJ 876*

  title={A ~7.5 M⊕ Planet Orbiting the Nearby Star, GJ 876*},
  author={Eugenio Jose Rivera and Jack J. Lissauer and R. Paul Butler and Geoffrey W. Marcy and Steven S. Vogt and D. A. Fischer and Timothy M. Brown and Gregory Laughlin and Gregory W. Henry},
  journal={The Astrophysical Journal},
High-precision, high-cadence radial velocity monitoring over the past 8 yr at the W. M. Keck Observatory reveals evidence for a third planet orbiting the nearby (4.69 pc) dM4 star GJ 876. The residuals of three-body Newtonian fits, which include GJ 876 and Jupiter-mass companions b and c, show significant power at a periodicity of 1.9379 days. Self-consistently fitting the radial velocity data with a model that includes an additional body with this period significantly improves the quality of… Expand
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