Table 2
Isotopic ratio derived from S-bearing molecules in TMC-1.
| Isotopes | Molecules | R* | SS+c | L483d | Notes |
|---|---|---|---|---|---|
| 32S/34S | CS/C34S | 11.1 ± 1.1 | 22.6 | a, b | |
| 13CS/13C34S | 23.6 ± 2.4 | 31 ± 9 | |||
| CCS/CC34S | 22.7 ± 2.3 | 17 ± 5 | 17 ± 5 | ||
| CCCS/CCC34S | 25.2 ± 2.5 | ||||
| HCS+/HC34S+ | 22.0 ± 2.2 | 21 ± 6 | |||
| HCCS+/HCC34S+ | 23.4 ± 2.3 | ||||
| H2CS/H2C34S | 24.6 ± 2.5 | 29 ± 9 | |||
| 32S/33S | 13CS/13C33S | 83.9 ± 8.4 | 127 | ||
| CCS/CC33S | 97.1 ± 9.7 | ||||
| CCCS/CCC33S | 109.7 ± 10.9 | ||||
| HCS+/HC33S+ | 68.8 ± 6.9 | ||||
| H2CS/H2C33S | 88.1 ± 8.8 | ||||
| 34S/33S | C34S/C33S | 3.7 ± 0.4 | 5.6 | b | |
| 13C34S/13C33S | 3.6 ± 0.4 | ||||
| CC34S/CC33S | 4.3 ± 0.4 | ||||
| CCC34S/CCC33S | 4.4 ± 0.4 | ||||
| H2C34S/H2C33S | 3.6 ± 0.4 | ||||
| 34S/36S | C34S/C36S | 353.4 ± 35.3 | 425 | b | |
| 33S/36S | C33S/C36S | 96.4 ± 9.6 | 75 | ||
| 12C/13C | CS/13CS | 68.8 ± 6.9 | 89 | a | |
| C34S/13C34S | 90.0 ± 9.0 | 58 ± 18 | b | ||
| C33S/13C33S | 87.1 ± 8.7 | ||||
| CCS/13CCS | 404.7 ± 40.4 | >25 | |||
| CCS/C13CS | 59.6 ± 6.0 | 28 ± 8 | |||
| CCCS/13CCCS | 309.1 ± 30.9 | ||||
| CCCS/C13CCS | 91.9 ± 9.2 | ||||
| H2CS/H213CS | 82.2 ± 8.2 | 113 ± 34 | |||
| HCS+/H13CS+ | 91.0 ± 9.1 | ||||
| 13C2/13C1 | C13CS/13CCS | 6.8 ± 0.7 | |||
| C13CCS/13CCCS | 3.4 ± 0.3 | ||||
| 13C/34S | 13CS/C34S | 0.26 ± 0.03 | 0.27 | ||
| 13CCS/CC34S | 0.06 ± 0.01 | ||||
| C13CS/CC34S | 0.38 ± 0.04 | ||||
| 13CCCS/CCC34S | 0.08 ± 0.01 | ||||
| C13CCS/CCC34S | 0.27 ± 0.03 | ||||
| H213CS/H2C34S | 0.30 ± 0.03 |
Notes. The estimated uncertainties are 10%. These ratios are obtained from the column densities given in Table 1. (*)Abundance ratio. (+)Solar System. (a)Underestimated by the opacity of the 1–0 of CS. (b)Some small correction of C34S may exist. (c)Values derived by Anders & Grevesse (1989) and Yan et al. (2023). (d)Values derived by Agúndez et al. (2019).
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