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Table 4
3 σ upper limits for the mole fractions of hydrogen halides in the Jovian troposphere inferred from Cassini/CIRS observations (Fouchet et al. 2004), the PACS observations, and the molecules’ respective Proto-Solar abundances.
| Molecule | New upper limit by PACS | Previous upper limit (Fouchet et al. 2004) | Proto-Solar composition mole fraction, derived from Lodders (2019) |
|---|---|---|---|
| HF | <1.1 × 10−11 | <2.7 × 10−11 | (1.1 ± 0.2) × 10−7 |
| HCl | <6.0 × 10−11 | <2.3 × 10−9 | (3.6 ± 0.5) × 10−7 |
| HBr | <2.3 × 10−10 | <1.0 × 10−9 | (8.4 ± 1.7) × 10−10 |
| HI | <1.2 × 10−9 | <7.6 × 10−9 | (1.1 ± 0.4) × 10−10 |
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