Table 2
Significance of the diffusion pre-factor for different grain species.
| Species | Gas-phase | Grain surface |
|---|---|---|
| JH | 100% | 100% |
| JN2 | 100% | 100% |
| JCH4 | 100% | 99% |
| JHNCO | 100% | 99% |
| JO2 | 99% | 98% |
| JCH3 | 100% | 96% |
| JHCO | 99% | 94% |
| JCH3OH | 100% | 93% |
| JH2CO | 98% | 89% |
| JCO | 99% | 86% |
| JNO | 98% | 83% |
Notes. The effect of different grain surface species on the model is caused by changes in their diffusion pre-factor. The values are the percentages for the gas-phase and grain surface species that are within twice the abundance ratio difference of models M2 and M3. The lower the value, the greater the impact of the species on the model results.
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