H I Lyman alpha emission from Saturn (1980-1990)

Details H I Lyman alpha emission from Saturn (1980-1990) H I Lyman alpha emission from Saturn (1980-1990)

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....9713691m&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. A9, Sept. 1, 1992, p. 13,691-13,703.

Astronomy and Astrophysics

Astronomy

17

H Alpha Line, Lyman Alpha Radiation, Planetary Radiation, Saturn Atmosphere, Ultraviolet Astronomy, Auroras, Dayglow, Iue

Scientific paper

The characteristics of the H I Ly alpha dayglow and auroral emissions from Saturn are investigated by analyzing observations made aboard the IUE satellite on Saturn over the 1980-1990 decade (covering a complete solar activity cycle). It was found that, in this period, the dayglow emission from Saturn had significant long-term variability, with decreasing disk brightness between 1980 and 1984 and increasing brightness, as well as increased short-term (days to months) variability, between 1987 and 1990. Both the long-term and short-term variability in the Saturn Ly alpha dayglow were strongly correlated with several different solar indices. Neither the dayglow nor the auroral emission exhibited any dependence on magnetic longitude. Attempts to observe auroral activity associated with a major solar flare which produced unprecedented geomagnetic activity in March 1989 were not successful.

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