Computer Science
Scientific paper
Jul 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993hst..prop.4580f&link_type=abstract
HST Proposal ID #4580
Computer Science
Hst Proposal Id #4580
Scientific paper
This proposal has the specific goal of determining the kinetic temperatures in the Jovian auroral region in the altitude range where the precipitating particles deposit their energy and from which emission in the H2 Lyman and Werner bands originates. Due to the low spectral resolution and low sensitivity of the IUE, rotational temperatures of H2 cannot be determined from IUE spectra of the Jovian ultraviolet aurora. At the altitudes of the uv aurora, near or below the homopause, the rotational and kinetic temperatures are expected to be equilibrated. IR observations of H3+ and hydrocarbon molecules (methane, acetylene, etc) indicate substantially higher temperatures in the auroral region than in the equatorial or midlatitude thermosphere of Jupiter. The temperature measurements proposed here, when coupled with modeling, will provide information about thermospheric heating due to precipitating particles and cooling processes at the altitudes of the uv aurora. The temperatures obtained here will be complementary to those obtained from the infrared measurements, since they pertain to a different altitude region.
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