New Light-Travel Time Models and Orbital Stability Study of the Proposed Planetary System HU Aquarii
arXiv:1112.0066 · doi:10.1111/j.1365-2966.2011.20283.x
Abstract
In this work we propose a new orbital architecture for the two proposed circumbinary planets around the polar eclipsing binary HU Aquarii. We base the new two-planet, light-travel time model on the result of a Monte Carlo simulation driving a least-squares Levenberg-Marquardt minimisation algorithm on the observed eclipse egress times. Our best-fitting model with resulted in high final eccentricities for the two companions leading to an unstable orbital configuration. From a large ensemble of initial guesses we examined the distribution of final eccentricities and semi-major axes for different parameter intervals and encountered qualitatively a second population of best-fitting parameters. The main characteristic of this population is described by low-eccentric orbits favouring long-term orbital stability of the system. We present our best-fitting model candidate for the proposed two-planet system and demonstrate orbital stability over one million years using numerical integrations.
9 Figures (B/W) and 2 tables, accepted for publication in MNRAS, this is pre-proof version
References in corpus (5)
Cited by in corpus (33)
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