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A revised model of Jupiter's inner electron belts: Updating the Divine radiation model
Author(s) -
Garrett Henry B.,
Levin Steven M.,
Bolton Scott J.,
Evans Robin W.,
Bhattacharya Bidushi
Publication year - 2005
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2004gl021986
Subject(s) - jovian , jupiter (rocket family) , physics , van allen radiation belt , galileo (satellite navigation) , equator , synchrotron radiation , astronomy , van allen probes , electron , latitude , magnetosphere , spacecraft , astrophysics , astrobiology , geology , planet , geodesy , saturn , nuclear physics , plasma
In 1983, Divine presented a comprehensive model of the Jovian charged particle environment that has long served as a reference for missions to Jupiter. However, in situ observations by Galileo and synchrotron observations from Earth indicate the need to update the model in the inner radiation zone. Specifically, a review of the model for 1 MeV < E < 100 MeV trapped electrons suggests that, based on the new synchrotron observations, the pitch angle distributions within L < 4 need to be updated by introducing two additional components: one near the Jovian magnetic equator and one at high magnetic latitudes. We report modifications to the model that reproduce these observations. The new model improves the fit to synchrotron emission observations and remains consistent with the original fit to the in situ Pioneer and Voyager data. Further modifications incorporating observations from the Galileo and Cassini spacecraft will be reported in the future.