Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-05-22
Int.J.Mod.Phys.B21:3981-3985,2007
Astronomy and Astrophysics
Astrophysics
5 pages, 2 figures, Accepted for publication in "Peoceedings of the International Conference on Frontiers in Nonlinear and Com
Scientific paper
10.1142/S0217979207045050
Planetary systems consisting of one star and n planets with equal planet masses \mu and scaled orbital separation are referred as EMS systems. They represent an ideal model for planetary systems during the post-oligarchic evolution. Through the calculation of Lyapunov exponents, we study the boundary between chaotic and regular regions of EMS systems. We find that for n > 2, there does not exist a transition region in the initial separation space, whereas for n=2, a clear borderline occurs with relative separation ~ \mu^{2/7} due to overlap of resonances (Wisdom, 1980). This phenomenon is caused by the slow diffusion of velocity dispersion (~ t^{1/2}, t is the time) in planetary systems with n >2, which leads to chaotic motions at the time of roughly two orders of magnitude before the orbital crossing occurs. This result does not conflict with the existence of transition boundary in the full phase space of N-body systems.
Sun Yi-Sui
Zhou Ji-Lin
No associations
LandOfFree
Do N-planet systems have a boundary between chaotic and regular motions? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Do N-planet systems have a boundary between chaotic and regular motions?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Do N-planet systems have a boundary between chaotic and regular motions? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-415920