Table 7
Estimated contribution of NH4SH salt to the total S budgets of each of the investigated sources, assuming 80–85% of the NH4+ cations quantified via the 6.85 µm band are bound to SH− anions.
| Source | NH | S in NH4SH |
|---|---|---|
| 1023 cm−2 | % S cosmic std.(a) | |
| Elias 16 | 0.89 (0.27)(b) | 14–15 |
| CK2 | 1.9 (0.6)(b) | 14–15 |
| B1-c | 8.3 (2.5)(b) | 17–18 |
| L1527 | 5.9 (1.8)(c) | 17–18 |
| W33A | 7.1 (2.1)(b) | 17–18 |
| S140 IRS1 | 2.2 (0.7)(b) | 10 |
Notes. Uncertainties are indicated in parentheses (). (a) ‘Relative to the diffuse ISM S/H of 1.66×10−5 from Esteban et al. (2004). (b)From Boogert et al. (2013). (c)From the 9.7 µm silicate feature; see Appendix E.2.
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