HD 83443c: A Highly Eccentric Giant Planet on a 22 yr Orbit

@article{Errico2022HD8A,
  title={HD 83443c: A Highly Eccentric Giant Planet on a 22 yr Orbit},
  author={Adriana Errico and Robert A. Wittenmyer and Jonathan Horner and Zhexing Li and Gregory Mirek Brandt and Stephen R. Kane and Tara Fetherolf and Timothy R. Holt and B. D. Carter and Jake Butler and Christopher G. Tinney and Sarah Ballard and Brendan P. Bowler and John F. Kielkopf and Huigen Liu and Peter P. Plavchan and Avi Shporer and Hui Zhang and Duncan J. Wright and Brett C. Addison and Matthew W. Mengel and Jack Okumura},
  journal={The Astronomical Journal},
  year={2022},
  volume={163}
}
We report the discovery of a highly eccentric long-period Jovian planet orbiting the hot-Jupiter host HD 83443. By combining radial velocity data from four instruments (AAT/UCLES, Keck/HIRES, HARPS, Minerva-Australis) spanning more than two decades, we find evidence for a planet with m sin i=1.35−0.06+0.07 M J, moving on an orbit with a = 8.0 ± 0.8 au and eccentricity e = 0.76 ± 0.05. We combine our radial velocity analysis with Gaia eDR3 /Hipparcos proper motion anomalies and derive a… 

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