Archival Study of Energetic Processes in the Upper Atmosphere of the Outer Planets

Details Archival Study of Energetic Processes in the Upper Atmosphere of the Outer Planets Archival Study of Energetic Processes in the Upper Atmosphere of the Outer Planets

Jun 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998stin...9810218b&link_type=abstract

Technical Report, NASA/CR-1998-208266; NAS 1.26:208266 Space Physics Lab.

Physics

Space Physics

Upper Atmosphere, Planets, Lyman Alpha Radiation, Iue, H Lines, Auroras, Exploration, Uranus (Planet), Toruses, Spectra, Periodic Variations, Methane, Longitude, Jupiter (Planet), Hydrogen, Gas Giant Planets, Excitation, Color, Io

Scientific paper

We compare International Ultraviolet Explorer (IUE) spectral observations of Jupiter's UltraViolet (UV) aurora in H-Lyman alpha (H-Lya) and H2 emissions with images of the UV aurora with HST to make more realistic interpretations of the IUE dataset. Use the limited spatial information in the IUE line-by-line spectra of the bright H-Lya line emission in the form of pseudo-monochromatic images at the IUE 3.5 arcsec resolution (Lya pseudo-images), to derive information on the emissions. Analysing of H2 spectra of Saturn's UV aurora to infer atmospheric level of auroral excitation from the methane absorption (color ratios). Analysing of a Uranus IUE dataset to determine periodicity in the emissions attributable to auroral emission fixed in magnetic longitude. Reviewing of the results from IUE observations of the major planets, upper atmospheres and interactions with the planets magnetospheres. Analysing of IUE spectra of the UV emissions from Io to identify excitation processes and infer properties of the Io-torus-Jupiter system.

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