Jovian H2 dayglow emission (1978-1989)

Details Jovian H2 dayglow emission (1978-1989) Jovian H2 dayglow emission (1978-1989)

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9510365m&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, July 1, 1990, p. 10365-10373.

Computer Science

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Dayglow, Emission Spectra, Iue, Jupiter Atmosphere, Lyman Alpha Radiation, Ultraviolet Spectra, Hydrogen, Satellite Sounding, Solar Cycles, Spatial Distribution, Temporal Distribution, Jupiter, Hydrogen, Airglow, Emissions, Equatorial Regions, Ultraviolet, Iue Satellite, Satellite Observations, Wavelengths, Calculations, Flux, Spectra, Intensity, Solar Effects, Fluorescence, Atmosphere, Formation, Solar Radiation, Origin

Scientific paper

The IUE data set accumulated through 10 years of Jovian equatorial observations is used to measure the long-term temporal variation of the H2 dayglow emission. The model that best fits the data indicates a possible correlation between long-term solar activity and the Jovian H2 emission in the region 1500-1700 A between 1978 and 1989, which spans the decline in solar activity for solar cycle 21 and the rise in solar activity accompanying solar cycle 22. The magnitude of the observed variation is closer to that of the solar Ly-alpha flux than the 10.7 cm radio flux. Short-wavelength H2 band emission intensity is inconsistent with the amount of long-wavelength emission but may be reconciled if relatively low-energy excitation or fluorescence of solar radiation is invoked. No persistent longitudinal feature analogous to the H I Ly-alpha can be identified.

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