Perturbation of circumsolar dust ring on stability of Sun- Earth triangular libration points

[摘要] Asteroid collisions and cometary outgassing produce grains and dust that cause to fill the interplanetary space. The particles are temporarily trapped into orbit of the Earth to develop a circumsolar dust ring. The ring encloses the Sun-Earth equilateral triangular libration points in terms of Restricted Three-Body Problem (RTBP). On the other hand, regions close to the triangular points are preferable as locations for placing astronomical satellite. Here we study the planar-circular RTBP of Sun-Earth system with considers the oblateness of Earth and the presence of a circumsolar dust ring. Perturbation of the dust ring on linear stability of the points is discussed and we find that the points are still stable. However, in general the presence of the circumsolar (resonant) dust ring decreases value of the critical mass parameter.

[发布机构] Astronomy Research Division, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, Jalan Ganesha 10, Bandung; 40132, Indonesia^1

[效力级别] 天文学

[关键词] Asteroid collision;Critical mass;Earth systems;Interplanetary space;Linear Stability;Restricted three body problem;Triangular libration points;Triangular points