The Lick-Carnegie Exoplanet Survey: A 3.1 M ⊕ Planet in the Habitable Zone of the Nearby M3V Star Gliese 581

@article{Vogt2010TheLE,
  title={The Lick-Carnegie Exoplanet Survey: A 3.1 M ⊕ Planet in the Habitable Zone of the Nearby M3V Star Gliese 581},
  author={Steven S. Vogt and R. Paul Butler and Eugenio Jose Rivera and Nader Haghighipour and Gregory W. Henry and Michael H. Williamson},
  journal={The Astrophysical Journal},
  year={2010},
  volume={723},
  pages={954-965}
}
We present 11 years of HIRES precision radial velocities (RVs) of the nearby M3V star Gliese 581, combining our data set of 122 precision RVs with an existing published 4.3-year set of 119 HARPS precision RVs. The velocity set now indicates six companions in Keplerian motion around this star. Differential photometry indicates a likely stellar rotation period of ~94 days and reveals no significant periodic variability at any of the Keplerian periods, supporting planetary orbital motion as the… Expand

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