Evidence for a Long-Period Planet Orbiting ∊ Eridani

  title={Evidence for a Long-Period Planet Orbiting ∊ Eridani},
  author={A. Hatzes and W. Cochran and B. McArthur and S. Baliunas and G. Walker and B. Campbell and A. Irwin and S. Yang and M. Kurster and M. Endl and S. Els and R. Butler and G. Marcy},
  journal={The Astrophysical Journal},
  • A. Hatzes, W. Cochran, +10 authors G. Marcy
  • Published 2000
  • Physics
  • The Astrophysical Journal
  • High-precision radial velocity (RV) measurements spanning the years 1980.8‐2000.0 are presented for the nearby (3.22 pc) K2 V star e Eri. These data, which represent a combination of six independent data sets taken with four different telescopes, show convincing variations with a period of …7 yr. A least-squares orbital solution using robust estimation yields orbital parameters of period yr, velocity amplitude m s 21 , ecP p 6.9 K p 19 centricity , projected companion mass , and semimajor axis 
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