High Resolution Observations of the Jovian UV Aurora: CYCLE4 Medium

Details High Resolution Observations of the Jovian UV Aurora: CYCLE4 Medium High Resolution Observations of the Jovian UV Aurora: CYCLE4 Medium

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994hst..prop.5424f&link_type=abstract

HST Proposal ID #5424

Computer Science

Hst Proposal Id #5424 Solar System Giant Planets

Scientific paper

The goals of this proposal are to determine both the kinetic temperatures in the Jovian auroral region and 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 methane homopause, the rotational and kinetic temperatures are expected to be equilibrated. From the amount of methane absorption in the spectral range of 1250-1300 A the altitude range from which the auroral H2 emission originates will be estimated. IR observations of H3+ and hydrocarbon molecules indicate substantially higher temperatures in the auroral region than in the equatorial or midlatitude thermosphere of Jupiter. The temperature and altitude 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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