Halogens in the Giant Planets: Upper Limits to HBr in Saturn and Jupiter

Details Halogens in the Giant Planets: Upper Limits to HBr in Saturn and Jupiter Halogens in the Giant Planets: Upper Limits to HBr in Saturn and Jupiter

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996icar..124..608n&link_type=abstract

Icarus, Volume 124, Issue 2, pp. 608-615.

Physics

2

Scientific paper

I have searched for absorptions from the molecule HBr in the 4 μm spectra of Jupiter and Saturn and find upper limits to the mole fraction of HBr to be q(HBr) <= 1.6 ppb in Saturn and q(HBr) <= 3 ppb in Jupiter, or two and four times the solar abundance of bromine in Saturn and Jupiter, respectively. The upper limit for Saturn is lower than the global abundance of bromine, if, as expected, bromine is enriched in Saturn relative to C1 carbonaceous chondrites. This deficiency is most likely the result of local sinks for HBr. Less likely is a global depletion of bromine, conceivably related to the low condensation temperature of bromine-containing solids in the presolar nebula. Searches for HCl in the 4 μm window are also possible, but require large enrichments of Cl for detection with existing data.

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