Table 1.
Comparison of derived parameters of the three Milky Way mass models by Irrgang et al. (2013) to observations.
| Parameter | Model I | Model II | Model III | Observation |
|---|---|---|---|---|
| M(≤20.0 kpc) | 2.3 | 2.2 | 2.7 |
 |
| M(≤39.5 kpc) | 4.1 | 3.8 | 6.1 |
 |
| M(≤200 kpc) | 19 | 12 | 30 |
 |
| vesc, ⊙ | 616 | 576 | 812 | ∼600e; 580 ± 63f |
Notes. The quantity M(≤R) is the total mass enclosed within a radius R and is given in units of 1011 M⊙. The Galactic escape velocity at the Sun’s position, vesc, ⊙, is in km s−1.
References.(a) Posti & Helmi (2018), (b) Watkins et al. (2018), (c) Sohn et al. (2018), (d) Helmi et al. (2018), (e) Hattori et al. (2018), (f) Monari et al. (2018).
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