Table 1
Median migration distance for stars of different ages and guiding radii.
| Median ± Std migration distance (kpc) | |||||
|---|---|---|---|---|---|
| Age (Gyr) | 3 < Rguide < 5 | 5 < Rguide < 7 | 7 < Rguide < 9 | 9 < Rguide < 11 | All Rguide |
| 0–2 | −0.9 ± 1.1 | 0.2 ± 1.5 | 0.1 ± 1.5 | 0.2 ± 1.4 | 0.2 ± 1.5 |
| 2–4 | −0.4 ± 2.3 | 0.5 ± 2.1 | 0.5 ± 1.9 | 0.5 ± 1.8 | 0.6 ± 1.9 |
| 4–6 | 0.1 ± 2.0 | 1.2 ± 2.1 | 1.2 ± 2.2 | 1.1 ± 2.1 | 1.2 ± 2.1 |
| 6–8 | 0.4 ± 2.4 | 2.2 ± 2.1 | 3.1 ± 2.0 | 3.3 ± 2.1 | 2.7 ± 2.3 |
| 8–10 | −0.1 ± 1.9 | 2.2 ± 1.9 | 3.9 ± 1.7 | 4.9 ± 1.7 | 3.0 ± 2.5 |
| 10–12 | 0.8 ± 1.6 | 3.0 ± 1.6 | 4.9 ± 1.6 | 6.5 ± 1.5 | 3.4 ± 2.4 |
| All ages | 0.2 ± 2.0 | 1.9 ± 2.1 | 2.0 ± 2.4 | 1.2 ± 2.4 | 1.6 ± 2.4 |
Notes. The migration distance is defined as Rguide − Rbirth, so a negative value means that stars of a given age (row) and guiding radius (column) had overall inward migration. We find younger stars have experienced less migration, and that stars located in the inner disk primarily migrated inward. For our entire sample, we find that a median migration distance of 1.6 ± 2.4 kpc, and a radius change root mean square of 2.9 kpc.
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