Densities and vibrational distribution of H(3+) in the Jovian auroral ionosphere

Details Densities and vibrational distribution of H(3+) in the Jovian auroral ionosphere Densities and vibrational distribution of H(3+) in the Jovian auroral ionosphere

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....97.6093k&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. E4, April 25, 1992, p. 6093-6101.

Astronomy and Astrophysics

Astronomy

46

Auroras, Hydrogen Ions, Infrared Astronomy, Jupiter Atmosphere, Local Thermodynamic Equilibrium, Vibrational Spectra, Electron Precipitation, Electron States, Emission Spectra, Methane, Planetary Ionospheres

Scientific paper

The assumption that H(3+) is in LTE in the region of the Jovian ionosphere from which the emissions originate is tested by calculating the vibrational distribution of H(3+) over the altitude range of 350 to 1500 km above the methane cloud tops. A model of the Jovian auroral ionosphere is constructed in which the neutral temperatures are enhanced over those of the midlatitude ionosphere, as suggested by observations and models of the auroral region. The energy and energy flux were found to be less than those involved in the production of the UV aurora. A computation of the densities and vibrational distribution shows that the distribution of the six lowest states of H(3+) can be determined fairly well in spite of uncertainties in the atomic and molecular data. The computed altitude profiles and vibrational distributions of H(3+) and H2 are consistent with the observations of IR emission in the 2- and 4-micron regions.

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