Table 1
Summary of the test-particle models.
| Model | Potential | Initial condition |
|---|---|---|
| TP (static) | Static bulge + Static disc + Static halo | t = 0 Myr |
| TP (Sgr) | Static bulge + Static disc + Static halo + Time-evolving Sgr | t= −300 Myr |
| TP (wake) | Static bulge + Static disc + Time-evolving halo | t= −300 Myr |
| TP (Sgr+wake) | Static bulge + Static disc + Time-evolving halo + time-evolving Sgr | t= −300 Myr |
Notes. First column: model names. Second column: gravitational potential configurations. Third column: times of N-body snapshots adopted for the initial conditions of the test-particle simulations. Bernet et al. (2025) also used the TP (static) model and referred to it as test-particle rerun.
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