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Table 2
Velocity ranges and 12C/13C isotopic ratios of the Galactic absorption components along the line of sight of Sgr B2(M).
| Velocity range | 12C/13C | Location |
| (1) | (2) | (3) |
|
|
||
| ~62 | 20 | Galactic Center, Sgr B2 |
| 39–25 | 40 | Scutum/Crux arm |
| 22–12 | 60 | Sagittarius arm |
| 8 – –9 | 20 | Galactic Center |
| –13−–50 | 40 | 3 kpc expanding ring |
| <−53 | 20 | Galactic Center |
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