Open Access
Table 2
Main parameters used in the PDR models of the main DFs.
| Model parameter | Value | Note |
|---|---|---|
| FUV illumination, G0 | 2 × 104 Habing | |
| AV (depth into the PDR) | 10 mag | |
| Thermal pressure Pth/k | (0.2–2) × 108 cm−3 K | Isobaric |
| Density nH = n(H)+2n(H2) | nH = Pth/kTk | Gradient |
| RV = AV/EB–V | 5.5 | Orion (a) |
| Cosmic Ray ζCR | 10−16 H2 s−1 | |
| Abundance O/H | 2.6 × 10−4 | Orion (b) |
| Abundance C/H | 1.4 × 10−4 | Orion(b) |
| Abundance S/H | 1.4 × 10−5 | Orion Bar(c) |
Notes. (a)Cardelli et al. (1989). (b)Sofia et al. (2004). (c) Goicoechea & Cuadrado (2021) and Fuente et al. (2024).
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