Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975icar...24..395c&link_type=abstract
(International Astronomical Union, Colloquium on Planetary Satellites, Cornell University, Ithaca, N.Y., Aug. 18-21, 1974.) Icar
Astronomy and Astrophysics
Astronomy
10
Angular Distribution, Astronomical Models, Astronomical Photometry, Hydrogen Clouds, Jupiter Atmosphere, Pioneer 10 Space Probe, Ultraviolet Photometry, Atmospheric Ionization, Atmospheric Models, Exosphere, Io, Toroids
Scientific paper
The Pioneer 10 ultraviolet photometer observations of the Jovian hydrogen torus are analyzed to obtain the angular distribution. The cloud is asymmetric about Io, where the atoms presumably originate, with the greater density occurring in the trailing portion. A simple model which assumes Jeans escape from the atmosphere of Io is developed and compared to the observations. The results suggest that the exospheric temperature is high (approximately 3000 K) and that the ionization lifetime of the cloud atoms is approximately 100,000 sec.
Carlson Richard W.
Judge Darrell L.
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