Open Access
Table 1
Reactions used in this work.
| Index | Reactants | Products | α | ß | γ | Reference | |
|---|---|---|---|---|---|---|---|
| Radiative association | |||||||
| 3681 | C + H | ⇒ | CH + γ | 1.00e-17 | 0.00 | 0.0 | UMIST |
| 3683 | H + O | ⇒ | OH + γ | 9.90e-19 | −0.38 | 0.0 | UMIST |
| 3703 | C + C | ⇒ | C2 + γ | 4.36e-18 | 0.35 | 161.3 | UMIST |
| 3705 | C + N | ⇒ | CN + γ | 5.72e-19 | 0.37 | 51.0 | UMIST |
| 3707 | C+O | ⇒ | CO + γ | 1.58e-17 | 0.34 | 1297.0 | UMIST |
| 3730 | O+O | ⇒ | O2+ γ | 4.90e-20 | 1.58 | 0.0 | UMIST |
| 3-body association | |||||||
| 4079 | H+M+O | ⇒ | M + OH | 4.33e-32 | −1.00 | 0.0 | UMIST |
| 4097 | C+M+O | ⇒ | CO + M | 2.14e-29 | −3.08 | −2114.0 | BDDG76 |
| 5000 | H+H+M | ⇒ | H2 + M | 6.43e-33 | −1.00 | 0.0 | KCD |
| 5001 | H + H + H2 | ⇒ | H2 + H2 | 9.00e-33 | −0.60 | 0.0 | KCD |
| 5002 | H+H+H | ⇒ | H + H2 | 4.43e-28 | −4.00 | 0.0 | BDHL72 |
| 7000 | H+H+O | ⇒ | H + OH | 1.00e-32 | 0.00 | 0.0 | BDHL72 |
| 7001 | C+H+O | ⇒ | CO + H | 2.14e-29 | −3.08 | −2114.0 | BDDG76 |
| Species exchange | |||||||
| 1 | CH + H | ⇒ | C + H2 | 2.70e-11 | 0.38 | 0.0 | UMIST |
| 3 | H + NH | ⇒ | H2 + N | 1.73e-11 | 0.50 | 2400.0 | UMIST |
| 8 | H + OH | ⇒ | H2 + O | 6.99e-14 | 2.80 | 1950.0 | UMIST |
| 11 | C2 +H | ⇒ | C + CH | 4.67e-10 | 0.50 | 30450.0 | UMIST |
| 14 | CO + H | ⇒ | C + OH | 5.75e-10 | 0.50 | 77755.0 | W80 |
| 18 | H + NO | ⇒ | NH + O | 9.29e-10 | −0.10 | 35220.0 | UMIST |
| 19 | H + NO | ⇒ | N + OH | 3.60e-10 | 0.00 | 24910.0 | UMIST |
| 24 | H + O2 | ⇒ | O + OH | 2.61e-10 | 0.00 | 8156.0 | UMIST |
| 42 | C + H2 | ⇒ | CH + H | 6.64e-10 | 0.00 | 11700.0 | UMIST |
| 44 | H2 + N | ⇒ | H + NH | 1.69e-09 | 0.00 | 18095.0 | UMIST |
| 48 | H2 + O | ⇒ | H + OH | 3.14e-13 | 2.70 | 3150.0 | UMIST |
| 52 | H2 + O2 | ⇒ | OH + OH | 3.16e-10 | 0.00 | 21890.0 | UMIST |
| 58 | C + CH | ⇒ | C2 + H | 6.59e-11 | 0.00 | 0.0 | UMIST |
| 61 | C + NH | ⇒ | CH + N | 1.73e-11 | 0.50 | 4000.0 | UMIST |
| 62 | C + NH | ⇒ | CN + H | 1.20e-10 | 0.00 | 0.0 | UMIST |
| 66 | C + OH | ⇒ | CH + O | 2.25e-11 | 0.50 | 14800.0 | UMIST |
| 67 | C + OH | ⇒ | CO + H | 1.81e-11 | 0.50 | 0.0 | W80 |
| 68 | C + CN | ⇒ | C2 + N | 4.98e-10 | 0.00 | 18116.0 | UMIST |
| 70 | C + CO | ⇒ | C2 + O | 2.94e-11 | 0.50 | 58025.0 | UMIST |
| 71 | C + N2 | ⇒ | CN + N | 8.69e-11 | 0.00 | 22600.0 | UMIST |
| 75 | C + NO | ⇒ | CN + O | 6.00e-11 | −0.16 | 0.0 | UMIST |
| 76 | C + NO | ⇒ | CO + N | 9.00e-11 | −0.16 | 0.0 | UMIST |
| 80 | C + O2 | ⇒ | CO + O | 5.56e-11 | 0.41 | −26.9 | UMIST |
| 100 | CH + N | ⇒ | C + NH | 3.03e-11 | 0.65 | 1207.0 | UMIST |
| 102 | CH + O | ⇒ | C + OH | 2.52e-11 | 0.00 | 2381.0 | UMIST |
| 104 | CH + O | ⇒ | CO + H | 1.02e-10 | 0.00 | 914.0 | UMIST |
| 116 | CH + O2 | ⇒ | CO + OH | 7.60e-12 | 0.00 | 0.0 | UMIST |
| 126 | N + NH | ⇒ | H + N2 | 4.98e-11 | 0.00 | 0.0 | UMIST |
| 130 | N + OH | ⇒ | NH + O | 1.88e-11 | 0.10 | 10700.0 | UMIST |
| 131 | N + OH | ⇒ | H + NO | 6.05e-11 | −0.23 | 14.9 | UMIST |
| 132 | C2 + N | ⇒ | C + CN | 5.00e-11 | 0.00 | 0.0 | UMIST |
| 133 | CN + N | ⇒ | C + N2 | 1.00e-10 | 0.40 | 0.0 | UMIST |
| 138 | N + NO | ⇒ | N2 + O | 3.38e-11 | −0.17 | −2.8 | UMIST |
| 144 | N + O2 | ⇒ | NO + O | 2.26e-12 | 0.86 | 3134.0 | UMIST |
| 195 | NH + NH | ⇒ | H2 + N2 | 1.70e-11 | 0.00 | 0.0 | UMIST |
| 197 | NH + O | ⇒ | N + OH | 1.16e-11 | 0.00 | 0.0 | UMIST |
| 198 | NH + O | ⇒ | H + NO | 1.80e-10 | 0.00 | 300.0 | UMIST |
| 206 | NH + NO | ⇒ | N2 + OH | 1.46e-11 | −0.58 | 37.0 | UMIST |
| 236 | O + OH | ⇒ | H + O2 | 1.77e-11 | 0.00 | −178.0 | UMIST |
| 240 | C2 + O | ⇒ | C + CO | 2.00e-10 | −0.12 | 0.0 | UMIST |
| 243 | CN + O | ⇒ | C + NO | 5.37e-11 | 0.00 | 13800.0 | UMIST |
| 244 | CN + O | ⇒ | CO + N | 5.00e-11 | 0.00 | 200.0 | UMIST |
| 251 | N2 + O | ⇒ | N + NO | 2.51e-10 | 0.00 | 38602.0 | UMIST |
| 261 | NO + O | ⇒ | N + O2 | 1.18e-11 | 0.00 | 20413.0 | UMIST |
| 377 | C2 + O2 | ⇒ | CO + CO | 1.50e-11 | 0.00 | 4300.0 | UMIST |
| 382 | CN + CN | ⇒ | C2 + N2 | 2.66e-09 | 0.00 | 21638.0 | UMIST |
| 387 | CN + NO | ⇒ | CO + N2 | 1.60e-13 | 0.00 | 0.0 | UMIST |
| 392 | CN + O2 | ⇒ | CO + NO | 5.12e-12 | –0.49 | –5.2 | UMIST |
| 416 | NO + NO | ⇒ | N2 + O2 | 2.51e-11 | 0.00 | 30653.0 | UMIST |
| 7601 | NH + O2 | ⇒ | NO + OH | 2.54e-14 | 1.18 | 312.0 | UMIST |
| Collisional dissociation | |||||||
| 194 | NH + NH | ⇒ | H + H + N2 | 1.16e-09 | 0.00 | 0.0 | UMIST |
| 205 | NH + NO | ⇒ | H + N2 + O | 7.40e-10 | 0.00 | 10540.0 | UMIST |
| 4060 | H + H2 | ⇒ | H+H+H | 4.67e-07 | –1.00 | 55000.0 | UMIST |
| 4061 | CH + H | ⇒ | C+H+H | 6.00e-09 | 0.00 | 40200.0 | UMIST |
| 4062 | H + OH | ⇒ | H+H+O | 6.00e-09 | 0.00 | 50900.0 | UMIST |
| 4067 | H + O2 | ⇒ | H+O+O | 6.00e-09 | 0.00 | 52300.0 | UMIST |
| 4069 | H2 + H2 | ⇒ | H + H + H2 | 1.00e-08 | 0.00 | 84100.0 | UMIST |
| 4070 | CH + H2 | ⇒ | C + H + H2 | 6.00e-09 | 0.00 | 40200.0 | UMIST |
| 4071 | H2 + OH | ⇒ | H + H2 + O | 6.00e-09 | 0.00 | 50900.0 | UMIST |
| 4074 | H2 + O2 | ⇒ | H2 + O + O | 6.00e-09 | 0.00 | 52300.0 | UMIST |
| 4076 | CO + M | ⇒ | C+M+O | 2.79e-03 | −3.52 | 128700.0 | BDDG76 |
| 7002 | CO + H | ⇒ | C+H+O | 2.79e-03 | −3.52 | 128700.0 | BDDG76 |
| 7585 | CH + O2 | ⇒ | CO + H + O | 1.14e-11 | 0.00 | 0.0 | UMIST |
Notes. “Index” refers to the index in the UMIST astrochemistry database. All reactions are of modified-Arrhenius form with a rate coefficient 
.
References. McElroy et al. (2013). BDHL72: Baulch et al. (1972). KCD: Konnov (2000). BDDG76: Baulch et al. (1976). W80: Westley (1980).
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