Cargando…

Statistics of the variations of the high-energy electron population between 7 and 28 Jovian radii as measured by the Galileo spacecraft

Recent measurements of the high-energy, omni-directional electron environment by the Galileo spacecraft Energetic Particle Detector (EPD) have been analyzed in the range from 7 to 28 Jupiter radii. 10- min averages of these data between Jupiter orbit insertion in 1995 to the end of the mission have...

Descripción completa

Detalles Bibliográficos
Autores principales: Insoo, Jun, Garrett, H B, Swimm, R, Evans, R W, Clough, G
Lenguaje:eng
Publicado: 2005
Materias:
Acceso en línea:https://dx.doi.org/10.1016/j.icarus.2005.01.022
http://cds.cern.ch/record/1003076
_version_ 1780911638959882240
author Insoo, Jun
Garrett, H B
Swimm, R
Evans, R W
Clough, G
author_facet Insoo, Jun
Garrett, H B
Swimm, R
Evans, R W
Clough, G
author_sort Insoo, Jun
collection CERN
description Recent measurements of the high-energy, omni-directional electron environment by the Galileo spacecraft Energetic Particle Detector (EPD) have been analyzed in the range from 7 to 28 Jupiter radii. 10- min averages of these data between Jupiter orbit insertion in 1995 to the end of the mission have been analyzed to provide estimates of the electron differential fluxes at 1.5, 2, and 11 MeV in the Jovian equatorial plane as a function of radial distance. These data provide a long term picture of the variations in the high-energy electron environment over the ~8 years of the Galileo mission. This paper reviews those measurements and the statistics associated with them for the 8 year period. In general, the data variations are well behaved with variations being within a factor of ~2 of a median value at a given distance from Jupiter. These results are analyzed in detail and the orbit variations discussed in the context of the overall data set. The results of this analysis of the long-term statistical variations in high-energy electron fluxes are directly applicable to models that estimate the effects of the radiation environment on Jupiter's moons and their atmospheres as they permit estimates of the possible range of radiation effects that might be expected.
id cern-1003076
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2005
record_format invenio
spelling cern-10030762019-09-30T06:29:59Zdoi:10.1016/j.icarus.2005.01.022http://cds.cern.ch/record/1003076engInsoo, JunGarrett, H BSwimm, REvans, R WClough, GStatistics of the variations of the high-energy electron population between 7 and 28 Jovian radii as measured by the Galileo spacecraftAstrophysics and AstronomyRecent measurements of the high-energy, omni-directional electron environment by the Galileo spacecraft Energetic Particle Detector (EPD) have been analyzed in the range from 7 to 28 Jupiter radii. 10- min averages of these data between Jupiter orbit insertion in 1995 to the end of the mission have been analyzed to provide estimates of the electron differential fluxes at 1.5, 2, and 11 MeV in the Jovian equatorial plane as a function of radial distance. These data provide a long term picture of the variations in the high-energy electron environment over the ~8 years of the Galileo mission. This paper reviews those measurements and the statistics associated with them for the 8 year period. In general, the data variations are well behaved with variations being within a factor of ~2 of a median value at a given distance from Jupiter. These results are analyzed in detail and the orbit variations discussed in the context of the overall data set. The results of this analysis of the long-term statistical variations in high-energy electron fluxes are directly applicable to models that estimate the effects of the radiation environment on Jupiter's moons and their atmospheres as they permit estimates of the possible range of radiation effects that might be expected.oai:cds.cern.ch:10030762005
spellingShingle Astrophysics and Astronomy
Insoo, Jun
Garrett, H B
Swimm, R
Evans, R W
Clough, G
Statistics of the variations of the high-energy electron population between 7 and 28 Jovian radii as measured by the Galileo spacecraft
title Statistics of the variations of the high-energy electron population between 7 and 28 Jovian radii as measured by the Galileo spacecraft
title_full Statistics of the variations of the high-energy electron population between 7 and 28 Jovian radii as measured by the Galileo spacecraft
title_fullStr Statistics of the variations of the high-energy electron population between 7 and 28 Jovian radii as measured by the Galileo spacecraft
title_full_unstemmed Statistics of the variations of the high-energy electron population between 7 and 28 Jovian radii as measured by the Galileo spacecraft
title_short Statistics of the variations of the high-energy electron population between 7 and 28 Jovian radii as measured by the Galileo spacecraft
title_sort statistics of the variations of the high-energy electron population between 7 and 28 jovian radii as measured by the galileo spacecraft
topic Astrophysics and Astronomy
url https://dx.doi.org/10.1016/j.icarus.2005.01.022
http://cds.cern.ch/record/1003076
work_keys_str_mv AT insoojun statisticsofthevariationsofthehighenergyelectronpopulationbetween7and28jovianradiiasmeasuredbythegalileospacecraft
AT garretthb statisticsofthevariationsofthehighenergyelectronpopulationbetween7and28jovianradiiasmeasuredbythegalileospacecraft
AT swimmr statisticsofthevariationsofthehighenergyelectronpopulationbetween7and28jovianradiiasmeasuredbythegalileospacecraft
AT evansrw statisticsofthevariationsofthehighenergyelectronpopulationbetween7and28jovianradiiasmeasuredbythegalileospacecraft
AT cloughg statisticsofthevariationsofthehighenergyelectronpopulationbetween7and28jovianradiiasmeasuredbythegalileospacecraft