Upper limits on hydrogen halides in Jupiter from Cassini/CIRS observations
Nixon, Conor A.; Irwin, Patrick G. J.; Fouchet, Thierry; Calcutt, Simon B.; Orton, Glenn
France, United States, United Kingdom
Abstract
We have determined the following upper limits for the mole fraction of hydrogen halides in Jupiter's atmosphere from Cassini/CIRS observations: [HF] <2.7×10 -11, [HCl] <2.3×10 -9, [HBr] <1.0×10 -9, [HI] <7.6×10 -9. These limits are smaller than solar composition for HF and HCl, and support the halogens' condensation in ammonium salts predicted by thermochemical models for the upper jovian troposphere.