Table 5.
Abundance ratios of select gas-phase species, Xgas vs. COgas.
| Environment | H2S | OCS | H2CS | SO | SO2 |
|---|---|---|---|---|---|
| TMC-1 (a) | 0.0009 | 0.001 | 0.003 | 0.01 | 0.0001 |
| L134N (b) | 0.001 | 0.002 | 0.00008 | 0.025 | 0.0005 |
| Orion (b) | 0.1 | 0.05 | 0.001 | 0.05 | 0.06 |
| n = 104 cm−3 | 0.0008 | 0.0004 | 0.003 | 0.02 | 0.0002 |
| t = 2 Myr | |||||
| n = 105 cm−3 | 0.01 | 0.003 | 0.02 | 0.08 | 0.003 |
| t = 0.3 Myr | |||||
| n = 106 cm−3 | 0.05 | 0.03 | 0.01 | 0.7 | 0.06 |
| t = 0.03 Myr |
Notes. Values are in terms of percentage with respect to COgas. Observed values are determined from the following:
Observed values for the S-bearing species are based on those referenced in Table 4 and Fig. 6, and scaled with respect to a value of f(CO) = 8 × 10−5 as per Irvine et al. (1987).
All values are taken from Table 1 of Charnley et al. (2001).
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