The Anglo-Australian planet search. XXIII. Two new jupiter analogs

Robert A. Wittenmyer, Jonathan Horner, C. G. Tinney, R. P. Butler, H. R A Jones, G. S. Salter, B. D. Carter, F. Elliott Koch, S. J. O'Toole, J. Bailey, D. Wright, Mikko Tuomi

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Abstract

We report the discovery of two long-period giant planets from the Anglo-Australian Planet Search. HD 154857c is in a multiple-planet system, while HD 114613b appears to be solitary. HD 114613b has an orbital period P = 10.5 yr, and a minimum mass msin i of 0.48 M Jup HD 154857c has P = 9.5 yr and msin i = 2.6 M Jup. These new data confirm the planetary nature of the previously unconstrained long-period object in the HD 154857 system. We have performed detailed dynamical stability simulations which show that the HD 154857 two-planet system is stable on timescales of at least 108 yr. These results highlight the continued importance of "legacy" surveys with long observational baselines; these ongoing campaigns are critical for determining the population of Jupiter analogs, and hence of those planetary systems with architectures most like our own solar system.

Original languageEnglish
Article number103
JournalThe Astrophysical Journal
Volume783
Issue number2
Early online date20 Feb 2014
DOIs
Publication statusPublished - 10 Mar 2014

Keywords

  • planets and satellites: detection
  • planets and satellites: dynamical evolution and stability
  • planets and satellites: individual (HD 114613, HD 154857)
  • techniques: radial velocities

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