A detailed analysis of the HD 73526 2:1 Resonant planetary system

Robert A. Wittenmyer, Xianyu Tan, Man Hoi Lee, Jonathan Horner, C. G. Tinney, R. P. Butler, G. S. Salter, B. D. Carter, H. R.A. Jones, S. J. O'Toole, J. Bailey, D. Wright, J. D. Crane, S. A. Schectman, P. Arriagada, I. Thompson, D. Minniti, M. Diaz

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


We present six years of new radial velocity data from the Anglo-Australian and Magellan Telescopes on the HD 73526 2:1 resonant planetary system. We investigate both Keplerian and dynamical (interacting) fits to these data, yielding four possible configurations for the system. The new data now show that both resonance angles are librating, with amplitudes of 40° and 60°, respectively. We then perform long-term dynamical stability tests to differentiate these solutions, which only differ significantly in the masses of the planets. We show that while there is no clearly preferred system inclination, the dynamical fit with i = 90°provides the best combination of goodness-of-fit and long-term dynamical stability.

Original languageEnglish
Article number140
JournalAstrophysical Journal
Issue number2
Publication statusPublished - 10 Jan 2014


  • methods: numerical
  • planets and satellites: dynamical evolution and stability
  • planets and satellites: individual (HD 73526)
  • techniques: radial velocities

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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