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

Journal article

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.

Authors: Wittenmyer, RA; Tan, X; Lee, MH; Horner, J; Tinney, CG

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: IOP Publishing
• Journal: Astrophysical Journal
• Volume: 780
• Issue: 2
• Pages: 140
• Publication date: 2013-12-18
• Acceptance date: 2013-11-26
• DOI: 10.1088/0004-637x/780/2/140
• EISSN: 1538-4357
• ISSN: 0004-637X
• Keywords: planets and satellites: individual (HD 73526); SBTMR; planets and satellites: dynamical evolution and stability; methods: numerical; techniques: radial velocities