Table 4
Synoptic summary of results.
| Sightline | Spiral arma | υ min , υ max | N(OH) | N(OH+) | N(H2) (b) | X(OH)c | X(OH+)c | H2 |
| [km s-1 ] | [1014 cm-2] | [1020 cm-2] | × 10-7 | proxy | ||||
|
|
||||||||
| G10.47 | (−20,0) | 5.5 ± 1.8 | 1.2 ± 0.1 | 10.7 ± 0.2 | 7.9 ± 1.0 | 4.33 ± 0.11 | CH | |
| Sgr | (0, + 50) | 19 ± 4 | 4.8 ± 0.3 | 277 ± 3 | 0.83 ± 0.17 | 0.27 ± 0.01 | CH | |
| Gal. bar | (+ 80, + 170) | 7.3 ± 0.3 | 4.6 ± 0.1 | 1167 ± 8 | 0.107 ± 0.001 | 0.07 ± 0.01 | CH | |
| G10.62d | Sgr | (+ 7, + 15) | 0.95 ± 0.01 | 0.67 ± 0.04 | 8.21 ± 0.09 | 1.25 ± 0.02 | 1.12 ± 0.09 | HF |
| Sgr | (+ 42, + 55) | 1.52 ± 0.05 | 0.25 ± 0.02 | 11.24 ± 0.26 | 1.47 ± 0.13 | 0.14 ± 0.01 | CH | |
| 12.08 ± 0.34 | 2.82 ± 0.79 | 0.28 ± 0.02 | HF | |||||
| Scutum | (+ 65, + 80) | − | 0.22 ± 0.01 | |||||
| G34.26 | Sgr | (0, + 15) | 1.34 ± 0.15 | 0.43 ± 0.02 | 14.41 ± 0.47 | 5.1 ± 6.4 | 0.69 ± 0.59 | HF |
| Sgr | (+ 15, + 30) | < 0.001 | 0.26 ± 0.01 | 9.39 ± 0.23 | < 0.005 | 1.05 ± 0.14 | HF | |
| (+ 38, + 46) | 0.37 ± 0.01 | 0.20 ± 0.01 | 3.39 ± 0.07 | 0.59 ± 0.02 | 1.35 ± 0.54 | HF | ||
| (+ 62, + 85) | 5 ± 13 | 0.023 ± 0.001 | 13.19 ± 0.67 | 49 ± 69 | 0.048 ± 0.027 | HF | ||
| W49N | interarm | (+ 20, + 30) | 0.83 ± 0.18 | 0.93 ± 0.01 | 22.9 ± 0.3 | 0.33 ± 0.03 | 0.40 ± 0.01 | CH |
| 4.2 ± 0.1 | 2.22 ± 0.20 | 2.79 ± 0.10 | HF | |||||
| Sgre | (+ 30, + 45) | 3.9 ± 0.1 | 2.17 ± 0.01 | 39.3 ± 0.9 | 0.93 ± 0.03 | 0.67 ± 0.02 | CH | |
| 36.6 ± 0.7 | 1.06 ± 0.02 | 0.85 ± 0.01 | HF | |||||
| Sgrf | (+ 45, + 70) | 4.0 ± 0.1 | 1.8 ± 0.1 | 70.3 ± 0.5 | 0.55 ± 0.01 | 0.42 ± 0.01 | CH | |
| 46.6 ± 0.5 | 1.54 ± 0.09 | 2.11 ± 0.17 | HF | |||||
| W51e2 | Sgr | (0, + 15) | 1.4 ± 0.2 | 0.43 ± 0.03 | 28.5 ± 7.0 | 0.49 ± 0.11 | 0.16 ± 0.04 | CH |
| 11.6 ± 0.1 | 4.41 ± 4.47 | 1.30 ± 0.96 | HF | |||||
| (+ 15, + 35) | < 0.1 | 0.28 ± 0.03 | 1.32 ± 0.07 | < 1.0 | 2.92 ± 0.72 | HF | ||
| (+ 40, + 50) | 0.91 ± 0.04 | 0.37 ± 0.01 | 25.9 ± 5.1 | 0.28 ± 0.06 | 0.16 ± 0.02 | CH | ||
| 10.5 ± 0.2 | 1.17 ± 0.15 | 1.39 ± 0.14 | HF | |||||
| G327.29 | Carina | (−25, + 10) | 2.6 ± 0.1 | 0.58 ± 0.01 | 37.1 ± 19.8 | 1.86 ± 0.77 | 0.77 ± 0.43 | CH |
| G330.95 | Crux | (−70,−50) | 4.0 ± 0.3 | 0.81 ± 0.02 | 89 ± 12 | 0.39 ± 0.04 | 0.09 ± 0.01 | CH |
| Crux | (−50,−25) | 11 ± 1 | 0.64 ± 0.01 | 84.4 ± 7.6 | 0.77 ± 0.09 | 0.16 ± 0.01 | CH | |
| Carina | (−25, + 5) | 0.027 ± 0.005 | 0.08 ± 0.01 | 0.80 ± 0.19 | 0.37 ± 0.11 | 0.97 ± 0.84 | CH | |
| G332.83 | Norma | (−74,−65) | 0.20 ± 0.11 | 0.007 ± 0.001 | ||||
| Crux | (−38,−30) | 0.55 ± 0.06 | 0.31 ± 0.02 | |||||
| Crux | (−30,−10) | 1.7 ± 0.1 | 0.55 ± 0.01 | |||||
| G351.58 | Crux, Norma | (−65,−35) | 3.3 ± 0.2 | 1.0 ± 0.1 | ||||
| Carina | (−5, + 5) | 0.42 ± 0.12 | 0.42 ± 0.02 | |||||
Notes. Column densities are integrated across the velocity intervals given in Col. 3. Abundances are mean values across the indicated velocity intervals. Data affected by saturated absorption are not considered.
using [CH]/[H2] = 3.5 × 10-8 (Sheffer et al. 2008) and [HF]/[H2] = 1.4 × 10-8 (cf. Appendix E);
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