Thermodynamic properties for the magnetosheath plasma near the subsolar region

• Main Authors: Wang, Y.C., 王玉慶
• Other Authors: J.K.Chao
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/63066631860118945746

碩士 === 國立中央大學 === 太空科學研究所 === 86 === Total 14 magnetosheath crossing events observed by AMPTE/ IRMduring 1984 to 1985 are used to study the thermodynamic propertiesfor the magnetosheath plasma near the subsolar region. Empirical polytropic equations wih temperature anisotropy areobtained from the best-fit of observations.Comparisons with the CGL and double-polytropic models are alsodiscussed. The magnetosheath crossings are devided into fiveequal spatoal areas based on their perturbation characteristics.All regions are analyzed in order to find their thermodynamicproperties. From the Earth's bow shock to the magnetopause, it isfound that the thermodynamic state will gradually evolve from anon-Maxwellian to an isothermal state and then approach to an adiabatic state near the magnetopause.