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Kinetic models for the exospheres of Jupiter and Saturn

dc.contributor.authorPierrard, V.
dc.date2009
dc.date.accessioned2016-04-05T13:47:15Z
dc.date.available2016-04-05T13:47:15Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/3311
dc.descriptionThe exospheric theory based on the Kappa velocity distribution function (VDF) is used to model the exosphere of the giant planets Jupiter and Saturn. Such Kappa velocity distribution functions with an enhanced population of suprathermal particles are indeed often observed in space plasmas and in the space environment of the planets. The suprathermal particles have significant effects on the escape flux, density and temperature profiles of the particles in the exosphere of the giant planets. The polar wind flux becomes several orders larger when suprathermal electrons are considered, so that the planetary ionosphere becomes then a significant source for their inner magnetosphere. Moreover, the number density of the particles decreases slower as a function of the altitude when a Kappa distribution is considered instead of a Maxwellian one. Two-dimensional maps of density are calculated for typical values of the temperatures. The exospheric formalism is also applied to study the escape flux from the exospheres of Io and Titan, respectively, moons of Jupiter and Saturn. © 2009 Elsevier Ltd. All rights reserved.
dc.languageeng
dc.titleKinetic models for the exospheres of Jupiter and Saturn
dc.typeArticle
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.subject.freeExosphere
dc.subject.freeGiant planets
dc.subject.freeInner magnetosphere
dc.subject.freeJupiter
dc.subject.freeJupiters
dc.subject.freeKappa distribution
dc.subject.freeKinetic model
dc.subject.freeKinetic models
dc.subject.freeNumber density
dc.subject.freePlanetary ionospheres
dc.subject.freePolar wind
dc.subject.freeSaturn
dc.subject.freeSpace environment
dc.subject.freeSpace plasmas
dc.subject.freeSuprathermal electrons
dc.subject.freeSuprathermal particles
dc.subject.freeTemperature profiles
dc.subject.freeTwo-dimensional map
dc.subject.freeTypical values
dc.subject.freeInterplanetary flight
dc.subject.freeIonosphere
dc.subject.freeKinetic theory
dc.subject.freeMagnetosphere
dc.subject.freePlanets
dc.subject.freePlasmas
dc.subject.freeVelocity control
dc.subject.freeDistribution functions
dc.source.titlePlanetary and Space Science
dc.source.volume57
dc.source.issue11
dc.source.page1260-1267
Orfeo.peerreviewedYes
dc.identifier.doi10.1016/j.pss.2009.04.011
dc.identifier.scopus2-s2.0-68949154616


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