Table A.1
Comparison between the fractionation procedure used in this work and the one by Roueff et al. (2015): steady state 12C/13C ratios of different molecular species in a chemical model adopting the initial conditions of the fiducial model of this work.
| 12C/13C ratio | Without scrambling | Full scrambling | 1C-molecule | 1C-molecule (this work) |
|---|---|---|---|---|
| 12C/13C | 69.0 | 69.0 | 69.7 | 75.8 |
| 12CH/13CH | 296.2 | 277.0 | 287.0 | 304.0 |
| 12CO/13CO | 68.2 | 68.2 | 68.2 | 68.4 |
H CO/H CO |
304.6 | 195.6 | 299.6 | 307.5 |
| 12CN/13CN | 104.3 | 90.6 | 204.2 | 287.4 |
| H12CN/H13CN | 271.0 | 130.6 | 299.3 | 283.5 |
| HN12C/HN13C | 295.1 | 128.6 | 321.6 | 283.8 |
| 12CS/13CS | 85.5 | 78.1 | 87.0 | 244.6 |
| H12CO+/H13CO+ | 28.3 | 28.3 | 28.3 | 26.0 |
Notes. Column 2 represents the results obtained with the same chemical network of Roueff et al. (2015) by suppressing the substituted 15 N-nitrogen species but keeping the deuterated components, and without considering a full scrambling of carbon atom in molecules, as described in Appendix A.1. Column 3 is the came as Col. 2, but considers full scrambling. Column 4 represents the results obtained with the same network as Col. 3, but considers inclusion of 13C only in molecules containing one carbon atom. Column 5 shows the corresponding results obtained with the chemical network developed for this work (Sect. 2.2), reduced with the same assumption made for Col. 4.
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