Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991uat..rept.....b&link_type=abstract
Technical Report, Arizona Univ. Tucson, AZ United States Lunar and Planetary Lab.
Astronomy and Astrophysics
Astronomy
Jupiter (Planet), Neptune (Planet), Uranus (Planet), Extreme Ultraviolet Radiation, Far Ultraviolet Radiation, Cataclysmic Variables, Voyager Project, White Dwarf Stars, Ultraviolet Astronomy, Auroras, Planetary Atmospheres, Emission Spectra, Airglow, Temperature Distribution, Radiative Transfer, Photochemical Reactions, Neutral Gases, Absorption Spectroscopy, Toroidal Plasmas, Ultraviolet Spectrometers, Atmospheric Composition, Thermal Analysis, Abstracts
Scientific paper
With the successful completion of the Neptune and Triton encounters in 1989, we have focussed on a variety of aspects of the atmospheres of those bodies. At the same time, we have pursued comparative studies of the four outer planets visited by Voyager. Our program of FUV and EUV astrophysical observations has remained active as well. We have used emission and absorption spectroscopy to study the atmospheres of Neptune and Triton. Among the topics investigated are airglow and auroral excitation of the atmospheres of both bodies, thermal structure, composition, photochemistry, and mixing in their atmospheres, haze production, and radiative transfer. We have investigated airglow emissions from Jupiter and Saturn, and pursued earlier studies related to Io's plasma torus. We have exploited the unique set of sky background maps made at a wide range of heliospheric distances to investigate the neutral hydrogen and helium of the interstellar wind. The Voyager ultraviolet spectrometer (UVS) continues to be the only instrument capable of protracted observations of stars in the extreme ultraviolet (EUV). We have continued our program of EUV and far ultraviolet (FUV) observations of astrophysical targets. Topics of particular interest have included cataclysmic variables, white dwarfs, and the FUV background. The Voyager guest investigator program of FUV observations continues. The following abstracts from publications summarize the results of the last two years.
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