Posthumus, Hannelys (2025) Determining Resonances of Stellar Streams in the Milky Way Halo. Bachelor's Thesis, Astronomy.
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Abstract
Stellar streams are formed by tidal stripping of globular clusters and dwarf galaxies in the Milky Way Potential. They serve as a powerful tool to constrain the properties of the potential of the Milky Way halo. In this thesis, we integrate stellar streams in a Milky Way potential including a triaxial dark matter halo. We focus on streams that are at a distance >15 kpc today, and determine their dynamical category: regular, resonant or chaotic. We find that 4 out of 25 streams are on a resonant orbit: 300S, C-12, Elqui and NGC 7492. There are also 4 out of 25 which have a Lyapunov exponent >0, indicating they are on a chaotic orbit: NGC 1261, NGC 1851, NGC 2298, Tucana III. All other streams we studied are on a regular orbit.
| Item Type: | Thesis (Bachelor's Thesis) |
|---|---|
| Supervisor name: | Helmi, A. and Woudenberg, H.C. |
| Degree programme: | Astronomy |
| Thesis type: | Bachelor's Thesis |
| Language: | English |
| Date Deposited: | 15 Jul 2025 07:38 |
| Last Modified: | 15 Jul 2025 07:38 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/36173 |
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