Abstract
This thesis analyzes the dynamics of the Planar (2+2)-Body Problem which consists of two asteroids moving under the gravitational force of each other and of two larger primaries. We use the McGehee blow up technique to remove the singularities in the dynamics associated with a triple collision with one of the primaries by introducing a new set of variables. Additional variables are introduced to reduce the dimension of the problem. We then derive the dynamics for these new variables. We then use the energy relation that comes from the original Hamiltonian to describe the collision manifold which is pasted in at the singularity associated with triple collision. We derive the dynamics on the collision manifold and prove several properties including the presence of gradient-like flow, the presence of 6 equilibrium points, and the stability at each of these points.
Degree
MS
College and Department
Mathematics; Computational, Mathematical, and Physical Sciences
Rights
https://lib.byu.edu/about/copyright/
BYU ScholarsArchive Citation
Sill, Nathaniel Scott, "McGehee Blow Up and Collision Manifold of Planar (2+2)-Body Problem" (2026). Theses and Dissertations. 11251.
https://scholarsarchive.byu.edu/etd/11251
Date Submitted
2026-04-23
Document Type
Thesis
Keywords
Planar four-body problem, Collision manifold, McGehee blow up, Celestial mechanics
Language
english