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Table 3
Abundance ratios for carbon-chain species between IR-peak and cloud regions.
| IR-peak/Cloud | |||
| Species | Obs. | ζ(NH) | 10-15 s-1 |
|
|
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| C2H | 14 | 8.6 | 2.7 |
| c-C3H2 | 25 | 13 | 3.3 |
| C4H | 5 | 8 | 4 |
Notes. The model results are obtained at 105 yr. Those listed under ζH(NH) are for the high-range column-dependent ζ in Fig. 2. Observations are from Pety et al. (2005).
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