The Anglo-Australian Planet Search XXIV: The Frequency of Jupiter Analogs

Robert A. Wittenmyer, R. Paul Butler, C. G. Tinney, Jonathan Horner, B. D. Carter, D. J. Wright, Hugh Jones, J. Bailey, Simon J. O'Toole

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Abstract

We present updated simulations of the detectability of Jupiter analogs by the 17-year Anglo-Australian Planet Search. The occurrence rate of Jupiter-like planets that have remained near their formation locations beyond the ice line is a critical datum necessary to constrain the details of planet formation. It is also vital in our quest to fully understand how common (or rare) planetary systems like our own are in the Galaxy. From a sample of 202 solar-type stars, and correcting for imperfect detectability on a star-by-star basis, we derive a frequency of ${6.2}_{-1.6}^{+2.8}$% for giant planets in orbits from 3 to 7 au. When a consistent definition of "Jupiter analog" is used, our results are in agreement with those from other legacy radial-velocity surveys.
Original languageEnglish
Pages (from-to)28
Number of pages11
JournalThe Astrophysical Journal
Volume819
Issue number1
Early online date24 Feb 2016
DOIs
Publication statusPublished - 1 Mar 2016

Keywords

  • planetary systems
  • radial velocities

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