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《天文和天体物理学研究(英文版)》 2017-01
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Extension of the rotating dipole model with oblateness of both primaries

Xiang-Yuan Zeng;Xiang-Dong Liu;Jun-Feng Li;School of Automation, Beijing Institute of Technology;School of Aerospace Engineering, Tsinghua University;  
A rotating mass dipole can be used to understand the dynamical behaviors around elongated asteroids as well as binary asteroids. In this paper an improved dipole model with oblateness in both primaries is investigated. The dynamical equations of a particle around the improved model are first derived by introducing the oblateness coefficients. The characteristic equations of equilibrium points are obtained, resulting in the emergence of new equilibria in the equatorial plane and the plane xoz depending on the shape of the spheroid. Numerical simulations are performed to illustrate the distribution of these equilibrium points. Significant influence from the oblateness of the primaries on the topological structure is also analyzed via zero-velocity curves.
【Fund】: supported by the National Natural Science Foundation of China(Nos.11602019 and 11572035);; China Postdoctoral Science Foundation(2015T80077);; The Excellent Young Teachers Program of Beijing Institute of Technology;; Beijing Institute of Technology Research Fund Program for Young Scholars
【CateGory Index】: P185.7
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