Contents of: VI/111/./abstract/BBEZARD_JUP_HYDR.abs

The following document lists the file abstract/BBEZARD_JUP_HYDR.abs from catalogue VI/111.
A plain copy of the file (without headers/trailers) may be downloaded.


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==> In this proposal, more time is being requested for BBEZARD.JUPSAT_1
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We propose to search for spectral signatures from diacetylene (C4H2),
benzene (C6H6), and methyl radical (CH3) on Jupiter, using the F-P mode
of the SWS. These observations are a follow-up of the accepted proposal
JUPSAT_1 in which we originally proposed to search for C4H2 and C6H6 on
both Jupiter and Saturn. The Jupiter observations had to be removed to
fit within the allocated time. These undetected hydrocarbons are expected
to be produced from the photochemistry of methane in the high atmosphere.
Diacetylene is the first step in the formation of polyacetylenes which
may contribute to the stratospheric hazes. Benzene is the simplest aromatic
molecule and may be a pathway to the formation of more complex aromatics
which could contribute to the yellowish chromophores and to the formation
of a photochemical smog. Methyl radical is the key pathway to the formation
of ethane, the most abundant hydrocarbon. Detecting these molecules would
provide an important test for some chemical schemes proposed in photochemical
models, and help determining some poorly constrained atmospheric parameters
such as the eddy mixing profile. In addition, we propose to search for
emission from carbon dioxide (CO2) which is predicted to have been formed
in detectable quantities following the Shoemaker-Levy 9 impacts in July 1994.
Detection of CO2 more than two years after the impacts would be important
to illuminate issues related to the composition and thermochemical processing
in the fireball and plume. It would also provide crucial information on the
long-term photochemical processes occuring after the impacts and on the
horizontal spreading of the plume material.





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