Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...241l.179c&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 241, Nov. 1, 1980, p. L179-L182.
Astronomy and Astrophysics
Astronomy
100
Auroral Spectroscopy, Jupiter Atmosphere, Planetary Magnetic Fields, Polar Regions, Spaceborne Astronomy, Earth Orbits, Explorer Satellites, H Alpha Line, Planetary Magnetospheres, Ultraviolet Astronomy
Scientific paper
Spatially resolved spectra of Jupiter taken with the International Ultraviolet Explorer satellite show enhanced emissions from the polar regions at H L-alpha (1216 A) and in the Lyman and Werner bands of H2 (1175-1650 A). Two types of variability in emission brightness have been observed in these aurorae: an increase in the observed emission as the auroral oval rotates with Jupiter's magnetic pole to face toward the earth and a general variation in brightness of more than an order of magnitude under nearly identical observing conditions. In addition, the spectral character of these aurorae (determined by the ratio of H L-alpha to H2 brightnesses) appears variable, indicating that the depth of penetration of the auroral particles is not constant.
Atreya Sushil K.
Clarke John T.
Lane Arthur L.
Moos Warren H.
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