University of Hertfordshire

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From the same journal

By the same authors

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

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  • 906849

    Accepted author manuscript, 553 KB, PDF document

  • 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
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Original languageEnglish
Article number140
Number of pages9
JournalThe Astrophysical journal
Volume780
Issue2
DOIs
Publication statusPublished - 10 Jan 2014

Abstract

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 degrees and 60 degrees, 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 degrees provides the best combination of goodness-of-fit and long-term dynamical stability.

ID: 7180522