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Table 3
Column densities and abundances for O2. (Tk = 30 K, nH = 1000 cm-3).
| Feature | Origin | N(O2) | N(H2) | X(O2) | X(OH)a | X(H2O)a | X(NH3)a |
| (km s-1) | (cm-2) | (cm-2) | (× 10-6) | (× 10-6) | (× 10-9) | (× 10-9) | |
|
|
|||||||
| +45.2 | +50 km s-1 Cloud | ≤ 1.4 × 1016 | 2.4 × 1023 | ≤ 0.05 | 8 | 40 | |
| −7.1 | Scutum Arm | 7.9 × 1017 | 5.5 × 1021 | 140 b | 2 e | 3 e | |
| ≤ 4.9 × 1016 | ≤ 9 c | ||||||
| 2.7 × 1016 | 4.9 d | ||||||
| −32.6 | −30 km s-1 Arm | 9.0 × 1017 | 3.2 × 1021 | 280 b | 6 | 30 | 5 |
| ≤ 7.8 × 1016 | ≤ 20 c | ||||||
| 3.1 × 1016 | 10 d | ||||||
Notes.
(a)
From Karlsson et al. (2013);
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