A DETAILED ANALYSIS OF THE HD 73526 2:1 RESONANT PLANETARY SYSTEM

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...

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Bibliographic Details
Published in:The Astrophysical journal 2014-01, Vol.780 (2), p.1-9
Main Authors: Wittenmyer, Robert A, Tan, Xianyu, Lee, Man Hoi, Horner, Jonathan, Tinney, C G, Butler, R P, Salter, G S, Carter, B D, Jones, H R A, O'Toole, S J
Format: Article
Language:English
Subjects:
AMPLITUDES
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
COMPUTERIZED SIMULATION
CONFIGURATION
Dynamical systems
Dynamics
EVOLUTION
INCLINATION
MASS
MATHEMATICAL SOLUTIONS
Planetary systems
PLANETS
RADIAL VELOCITY
RESONANCE
SATELLITES
STABILITY
Stability tests
TELESCOPES
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Summary: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.
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/780/2/140