Table 5
Model (a) and (b) results and observations. ss means stationary state. The value of the o/p ratio of H2 is taken as 10-3.
| Model (a) | Model (b) | TMC1 | L1544 | B1 | ||
| t = 106 yr | ss | ss | ||||
|
|
||||||
| Electronic fraction | 1.4 × 10-8 | 2.8 × 10-8 | 1.7 × 10-8 | |||
| N/15N | 440 | 456 | 455 | |||
| 2 × N2/15NN | 438 | 431 | 437 | |||
| NH/15NH | 429 | 428 | 421 | |||
| NH/ND | 16 | 31 | 9 | |||
| NH3/H2 | 6.7 × 10-9 | 1.3 × 10-9 | 6.0 × 10-9 | 2 × 10-8(8) | ||
| NH3/15NH3 | 333 | 386 | 387 | 300 (1) |
||
| NH2D/H2 | 3.8 × 10-10 | 5.8 × 10-11 | 3.3 × 10-10 | 4 × 10-10(9) | ||
| NH2D/15NH2D | 215 | 276 | 336 | 230 (1) |
||
| NH3/NH2D | 18 | 22 | 18 | 50 (9) | ||
| N2H+/H2 | 4.8 × 10-10 | 1.3 × 10-10 | 2.1 × 10-10 | 5 × 10-10(8) | ||
| N2H+/N15NH+ | 431 | 430 | 423 | 1050±220(2) | 400 (1) |
|
| N2H+/15NNH+ | 437 | 432 | 433 | 1110±240(2) | >600 (1) | |
| N2H+/N2D+ | 16 | 29 | 8.6 | 12.5 (9) | 2.9 (1) | |
| CN/H2 | 6.8 × 10-9 | 5.5 × 10-9 | 1.2 × 10-9 | 3 × 10-8(8) | ||
| CN/13CN | 67 | 84 | 63 | 50 (1) |
||
| CN/C15N | 430 | 449 | 445 | 240 (1) |
||
| 13CN/C15N | 6.4 | 5.3 | 7.0 | 7.5±1(3) | ||
| HCN/H2 | 7.4 × 10-9 | 5.9 × 10-10 | 5.4 × 10-10 | 2 × 10-8(8) | ||
| HCN/H13CN | 93 | 168 | 114 | 30 (1) |
||
| HCN/HC15N | 398 | 445 | 453 | 165 (1) |
||
| H13CN/HC15N | 4.3 | 2.6 | 4.0 | 2–4.5 (5) | 5.5 ±1 (1) | |
| HCN/DCN | 43 | 96 | 22 | 20 (1) |
||
| HNC/H2 | 5.6 × 10-9 | 7.4 × 10-10 | 8.4 × 10-10 | 2 × 10-8(8) | ||
| HNC/HN13C | 93 | 180 | 121 | 54–72 (4) | 20 (1) |
|
| HNC/H15NC | 405 | 442 | 446 | 250–330 (4) | 75 (1) |
|
| HN13C/H15NC | 2.5 | 1.75 | 3.7 | 4.6 ± 0.6 (4) | 3.7 ± 1 (1) | |
| HNC/DNC | 23 | 66 | 16 | 2.9 (1) |
||
| NO/H2 | 1 × 10-7 | 3.1 × 10-8 | 4.1 × 10-8 | 2.7 × 10-8(10) | ||
| NO/15NO | 438 | 451 | 446 | |||
| CO/H2 | 8.1 × 10-5 | 8.0 × 10-5 | 2.8 × 10-5 | 8 × 10-5(8) | ||
| CO/13CO | 68 | 67.4 | 68 | |||
| CH/H2 | 1.3 × 10-9 | 1.7 × 10-9 | 1.7 × 10-10 | 2 × 10-8(8) | ||
| CH/13CH | 74 | 154 | 71 | > 71 (6) | ||
| HCO+/H2 | 2.5 × 10-9 | 3.610-10 | 5.7 × 10-10 | 8 × 10-9(8) | ||
| HCO+/H13CO+ | 56 | 65 | 56 | 59 (7) | ||
| HCO+/DCO+ | 15 | 29 | 8.4 | 50 (9) | ||
Reference. (1) Daniel et al. (2014); (2) Bizzocchi et al. (2013); (3) Hily-Blant et al. (2013b); (4) Liszt & Ziurys (2012); (5) Hily-Blant et al. (2013a); (6) Sakai et al. (2013); (7) Hirano & Liu (2014) assuming CO/C18O = 500; (8) Ohishi et al. (1992); (9) Tiné et al. (2000); (10) Gerin et al. (1993).
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