Table 1
Parameters derived from the analysis of the CH+ and H2 lines.
| Diagnostics | Quantity | Measured value in the Bar | Measured value in d203-506 |
|---|---|---|---|
| H2 lines | N(H2)(a) | (1.6 ± 0.1) × 1021 cm−2 | (8.7 ± 0.8) × 1019 cm−2 |
| T(a) | 566 ± 7 K | 836 ± 13 K | |
| CH+ near-IR lines | F (rate C++H2)(b, c) | 2.0–6.0 × 1010 cm−2 s−1 | 1.5–4.5 × 1011 cm−2 s−1 |
| nH(c) | 0.6–1.5 × 106 cm−3 | 0.6–2.0 × 107 cm−3 | |
Notes. (a)The uncertainties of these values do not take into account calibration effects. They could be increased by a factor of 2–3 if the uncertainty associated with calibration effects is equal to 20%. (b) Number of CH+ molecules formed per unit area and time via either formation route (in cm−2 s−1). (c)The inferred value would be reduced if inelastic collisional excitation were to play a significant role.
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