Table 2
Results of optical depth fits and resulting o-NH3 abundances derived from H2CO observations by Wadiak et al. (1988) and CH observations by Polehampton et al. (2005b).
| Feature | τNH3a | ΔVNH3 | N(o-NH3) | N(NH3)mod | V LSR,H2CO | N(H2CO) | X(o-NH3)b | VLSR,CHc | N(CH) | X(o-NH3)d |
| [km s-1] | [cm-2] | [cm-2] | [km s-1] | [cm-2] | [km s-1] | [cm-2] | ||||
|
|
||||||||||
| A | 0.71 | 9.8 | 2.7 × 1013 | 6.9 × 1013 | −105 | ~6.1 × 1013e | ~9.0 × 10-10e | −107.6 | 0.9 × 1014 | 1.2 × 10-8 |
| B | 0.44 | 12.8 | 2.2 × 1013 | 5.5 × 1013 | −75 | < 2.3 × 1013 | > 1.9 × 10-9 | −81.7 | 2.6 × 1014 | 3.4 × 10-9 |
| C | 1.57 | 4.3 | 2.7 × 1013 | 6.6 × 1013 | −41 | 3.3 × 1013 | 1.6 × 10-9 | −44.0 | 1.5 × 1014 | 7.1 × 10-9 |
| D I | 0.46 | 3.5 | 6.2 × 1012 | 1.6 × 1013 | −27 | < 7.0 × 1012 | > 1.8 × 10-9 | |||
| D II | 0.46 | 4.4 | 8.0 × 1012 | 2.0 × 1013 | −20 | < 1.2 × 1013 | > 1.3 × 10-9 | −24.4 | 1.9 × 1014 | 1.7 × 10-9 |
| F | 0.52 | 8.5 | 1.7 × 1013 | 4.3 × 1013 | +32 | 1.1 × 1013 | 3.2 × 10-9 | +31.4 | 1.5 × 1014 | 4.6 × 10-9 |
Notes. Including total ammonia column densities estimated by the representative RADEX model of a diffuse molecular cloud for comparison.
calculated assuming X(H2CO) = [H2CO]/[H2] = 2 × 10-9 (Dickel & Goss 1990);
velocities from H i absorption data (Garwood & Dickey 1989);
calculated assuming X(CH) = [CH]/[H2] = 4 × 10-8 (Liszt & Lucas 2002);
from Downes et al. (1980), assuming Tex = 3.1 K.
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