The following animations were created as part of a project of parallel computing during my second year of the master Dynamiques des systèmes gravitationnels at the observatory of Paris. The motion of N bodies interacting according to the Newtonian laws is numerically integrated using the C language and the MPI & openMP libraries. Since the aim of the project was an introduction to parallel computing, and not to efficient N-body integrators, a simple leap-frog integrator was developed.
This animation was the heaviest run of the project. It ran for 24 hours on the computing center MesoPSL using 96 threads. It features 40000 bodies of equal masses.
This animation has 20000 bodies of equal masses.
Giving a big share of the total mass to one body can help make the system more galaxy-like. Here the central body contains 20% of the total mass of the system. All the other bodies have the same mass.
Here the central body contains 80% of the total mass of the system. All the other bodies have the same mass.
Je ne compris pas pourquoi il était si important que les moutons mangeassent les arbustes.