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Table 1
Adopted spiral arms properties.
| Property | Symbol | Value | Unit |
|
|
|||
| Number of arms | m | 2 | – |
| Pitch angle | i | 14° | – |
| Half width | σ | 4.7 | kpc |
| Scale length |
|
2.5 | kpc |
| Spiral pattern speed | Ωp | 23 | km s-1 kpc-1 |
| Perturbation amplitude | ζ 0 | 600 | km2 s-2 kpc-1 |
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