Popp, Dominic (2025) The relation between the ED-3 halo substructure and the globular cluster NGC 3201. Bachelor's Thesis, Astronomy.
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Abstract
The Milky Way’s stellar halo is thought to contain debris from past mergers, including globular clusters (GCs) from accreted systems. NGC 3201, a GC on a retrograde halo orbit, is suggested by Dodd et al., 2024 to be linked to the accreted substructure ED-3 (Dodd et al. 2023) due to their similar orbits and integrals of motion. We performed test-particle simulations in AGAMA, modeling an ED-3 progenitor with varying masses (5 × 10⁵ – 5 × 10⁶ M⊙), sizes (dwarf-like: 0.25 kpc, GC-like: 0.02 kpc), and integration times (5–10 Gyr). Comparing velocity distributions, integrals of motion, and the ratio N(vz > 0)/N(vz < 0), we found NGC 3201 is unlikely to be the core of the common progenitor. However, a dwarf-like system (5 × 10⁶ M⊙, 10 Gyr) or a massive GC-like system (5 × 10⁶ M⊙, 7.5 Gyr) provides a good overlap with observed ED-3 data. In both progenitor cases, simulated particles are close in velocity and position space with NGC 3201 in position and velocity space, suggesting a common disrupted progenitor.
| Item Type: | Thesis (Bachelor's Thesis) |
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| Supervisor name: | Helmi, A. and Woudenberg, H.C. |
| Degree programme: | Astronomy |
| Thesis type: | Bachelor's Thesis |
| Language: | English |
| Date Deposited: | 06 Mar 2025 10:04 |
| Last Modified: | 06 Mar 2025 10:04 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/34839 |
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