Colliding Galaxies in a (Nut)Shell

MSc Thesis Project (2022)

Simulation of two colliding disc galaxies (1:2 mass ratio), merging into a shell galaxy. The gas of the two systems is shown in blue, while the old and newly formed stellar populations are shown in grey and white respectively.

I run numerical simulations of two merging disc galaxies and their formation into a shell galaxy, using the RAMSES code (Teyssier, 2002). By conducting a parameter survey, I explore different sets of parameters to find an orbtial configuration favourable for shell formation. Based on that, I perform an idealised high-resolution merger simulation, and follow its formation into a shell galaxy. I then analyse how the merger-driven star formation activity evolves throughout time, within the system, what the physical conditions are for it, and how it relates to the formation of shells.

Supervisor: Florent Renaud
Thesis: LUP Student Papers
Publication: ArXiv, MNRAS

Copyright © Jonathan Petersson 2025

2025-04-11