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Table 3
Comparison of observations and models for HD 147888 and HD 37903.
| HD 147888 | HD 37903f | |||
| Observed | Model 1 | Model 2 | Model | |
|
|
||||
| star-cloud distance | – | 0.62 pc | 0.96 pc | 0.45 pc |
| on the observer’s side | – | 1 Draine unit | 1 Draine unit | 1 Draine unit |
| on the star’s side | – | 700 Draine units | 1 Draine unit | 1 Draine unit |
| hydrogen density | 215a cm-3, 425b cm-3 | 89–336 cm-3 | 3200–22 000 cm-3 | 544–1874 cm-3 |
| gas kinetic temperature | 38c K, 42d K | 358–98 K | 129–34 K | 377–100 K |
| total N(H2) | 3.7 × 1020 cm-2 | 3.7 × 1020 cm-2 e | 2.5 × 1021 cm-2 | 9.6 × 1020 cm-2g |
| f(H2) | 0.13 | – | 0.91 | 0.56g |
| (O/P)* | 1.13 | 1.56 | 1.36 | 1.35g, 1.57 |
Notes.
(a)
From C2 excitation (Sonnentrucker et al. 2007); density may be higher due to higher radiation field.
(b)
From chemical model (Pan et al. 2005).
(c)
T02 of C2 (Sonnentrucker et al. 2007).
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