Open Access
Table 1
Spiral arms’ parameters.
| Parameters | Arm 1 | Arm 2 | Arm 3 | Arm 4 | Local Spur(★) |
|---|---|---|---|---|---|
| Ri (kpc) | 3.27 | 4.29 | 3.58 | 3.98 | 8.16 |
| Ψi (°) | 9.87 | 10.51 | 10.01 | 8.14 | 2.71 |
| θi (°) | 38.5 | 189 | 215.2 | 320.1 | 50.6 |
Notes. Parameter values used in Eq. (8) to model the Milky Way spiral arms (Hou & Han 2014). (★) The Local Spur is defined only for 50.6° < θ < 110°.
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