Physics – Space Physics
Scientific paper
Jan 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996stin...9670902b&link_type=abstract
Technical Report, Michigan Univ. Ann Arbor, MI United States Space Physics Research Lab.
Physics
Space Physics
Lyman Alpha Radiation, Jupiter (Planet), H Alpha Line, Jupiter Atmosphere, Planetary Ionospheres, Iue, Equatorial Regions
Scientific paper
The IUE program consisted of observations of the H-Ly alpha bulge, which is an excess in the reflected solar Ly-alpha emission in Jupiter's equatorial region caused by a broadening of the emission line by a super-thermal population of H atoms. The observations were made at low and high spectral resolution to measure the longitudinal behavior of the line profile, the longitudinal extension of the bulge emission (which is known to vary), and to study the relation between the two properties. Unfortunately, on the observing date the bulge emission was very weak and the particle noise for IUE was very high, resulting in poor quality data, particularly the high-resolution data. The only solid results were that the bulge intensity was weak and that the longitudinal extension was normal. These results are marginal and do not merit publication in a major journal. We were able to coordinate our IUE observations close in time to observations of the same H emissions with the Hubble Space Telescope at very high spectral resolution (GHRS Echelle-A data) by our French collaborators at Orsay (C. Emerich et. al.). The IUE results have been provided to this group for hopeful inclusion in their work.
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