The HD 217107 planetary system: Twenty years of radial velocity measurements

@article{Giovinazzi2020TheH,
  title={The
 HD
 217107 planetary system: Twenty years of radial velocity measurements},
  author={Mark R. Giovinazzi and Cullen H. Blake and Jason D. Eastman and Jason T. Wright and Nate McCrady and Robert A. Wittenmyer and John Asher Johnson and Peter P. Plavchan and David H. Sliski and Maurice L. Wilson and Samson A. Johnson and Jonathan Horner and Stephen R. Kane and Audrey Houghton and Juliana Garc'ia-Mej'ia and Joseph Paul Glaser},
  journal={arXiv: Earth and Planetary Astrophysics},
  year={2020}
}
The hot Jupiter HD 217107 b was one of the first exoplanets detected using the radial velocity (RV) method, originally reported in the literature in 1999. Today, precise RV measurements of this system span more than 20 years, and there is clear evidence for a longer-period companion, HD 217107 c. Interestingly, both the short-period planet ($P_\mathrm{b}\sim7.13$ d) and long-period planet ($P_\mathrm{c}\sim5059$ d) have significantly eccentric orbits ($e_\mathrm{b}\sim0.13$ and $e_\mathrm{c… 
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