Doppler shifted H LY alpha emission from Jupiter's aurora

Details Doppler shifted H LY alpha emission from Jupiter's aurora Doppler shifted H LY alpha emission from Jupiter's aurora

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989georl..16..587c&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 16, June 1989, p. 587-590.

Physics

23

Auroras, Doppler Effect, H Alpha Line, Jupiter Atmosphere, Lyman Alpha Radiation, Iue, Proton Precipitation, Jupiter, Doppler Effects, Lyman-Alpha Radiation, Emissions, Hydrogen, Iue Satellite, Satellite Observations, Formation, Source, Protons, Escape, Atmosphere, Ionosphere, Acceleration, Plasma, Spectra, Energy, Velocity, Magnetosphere

Scientific paper

High-spectral-resolution IUE observations of the aurora on Jupiter were obtained in order to search for Doppler shifted H-Ly-alpha emission produced through charge exchange by fast precipitating protons. Although no emission has been observed corresponding to proton energies greater than 200 eV, a large fraction of the H-Ly-alpha emission has appeared Doppler shifted, mainly toward the blue, by about 50 km/s. These results show that the acceleration of ionospheric plasma in an H2 atmosphere can lead to bright Ly-alpha emission, setting constraints on the production of the outer planet airglow emissions.

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