Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20..747b&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 8, p. 747-750.
Astronomy and Astrophysics
Astronomy
12
Atmospheric Scattering, Jupiter (Planet), Lyman Alpha Radiation, Resonance Scattering, Spectral Line Width, Atmospheric Turbulence, Radiative Transfer, Turbulence Models, Ultraviolet Astronomy, Ultraviolet Spectrometers, Velocity Distribution
Scientific paper
We outline for the first time the effect of such nonthermal line broadening processes as turbulence, random waves, convection, etc., on the shape and intensity of the H Ly-alpha line resonance scattered from the atmosphere of Jupiter. We show how a nonthermal velocity field confined to the bulge region, in the upper atmosphere of Jupiter, may account for most of the H Ly-alpha bulge features. Both the shape and the brightness of the Ly-alpha line from the bulge region as reported by the IUE instrument and the Voyager UV Spectrometer can be recovered assuming resonant scattering with a total atomic hydrogen of about 4 x 10 exp 17/sq cm, and a nonthermal component H of about 2 x 10 exp 15/sq cm above the thermopause.
Ben Jaffel Lotfi
Clarke John T.
Gladstone Randall G.
Prangé Renee
Vidal-Madjar Alfred
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