日本地球惑星科学連合2019年大会

講演情報

[J] ポスター発表

セッション記号 P (宇宙惑星科学) » P-EM 太陽地球系科学・宇宙電磁気学・宇宙環境

[P-EM17] 宇宙プラズマ理論・シミュレーション

2019年5月30日(木) 17:15 〜 18:30 ポスター会場 (幕張メッセ国際展示場 8ホール)

コンビーナ:梅田 隆行(名古屋大学 宇宙地球環境研究所)、天野 孝伸(東京大学 地球惑星科学専攻)、成行 泰裕(富山大学人間発達科学部)、中村 匡(福井県立大学)

[PEM17-P02] Study of Kinetic Alfven waves in space plasmas with electron having Kappa distribution

*SATYAVIR SINGH1Krushna Chandra Barik1Yoshiharu Omura2Gurbax Singh Lakhina1 (1.Indian Institute of Geomagnetism, New Panvel, India、2.Research Institute for Sustainable Humanosphere, Kyoto University, Kyoto, Japan)

キーワード:Earth, Magnetosphere, kinetic Alfven waves

A theoretical model is developed by assuming a three component plasma comprising of the cold background ions, hot electrons having kappa distribution and hot ion beams to study the generation of kinetic Alfvén waves (KAWs).The background ions and beam ions are considered Maxwellian and the ion beam is only allowed to have velocity shear and non-uniform streaming. A dispersion relation for the excitation of the kinetic Alfven waves (KAWs) is analyzed. The effect of plasma parameters like number density, propagation angle, temperature, kappa etc. on the excitation of KAWs is examined. A comparative study of the results obtained from this model will be carried out with a plasma model having all the three species as Maxwellian. Further, an application of the theoretical model will be discussed relevant in the Earth’s magnetosphere.