日本地球惑星科学連合2018年大会

講演情報

[EE] 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-EM16] Dynamics of Earth's Inner Magnetosphere and Initial Results from Arase

2018年5月22日(火) 15:30 〜 17:00 ポスター会場 (幕張メッセ国際展示場 7ホール)

コンビーナ:Danny Summers(Memorial University of Newfoundland)、三好 由純(名古屋大学宇宙地球環境研究所)、細川 敬祐(電気通信大学大学院情報理工学研究科、共同)、海老原 祐輔(京都大学生存圏研究所)

[PEM16-P04] Multi-satellite observations of wave evolution from chorus to HISS

*RONGXIN TANG1He Zhang1Deyin Yu1Haimeng Li1Xiaohua Deng1 (1.Institute of Space Science and Technology, Nanchang University, Nanchang, China)

キーワード:Earth's radiation belts, Whistler-mode chorus waves, HISS

Whistler-mode chorus waves and HISS are suggested to play key roles in particle acceleration and loss processes in Earth’s radiation belts. Full particle computer simulations presented the generation of rising-tone elements of chorus and HISS near the magnetic equator in a dipole-like field, which has been well described by nonlinear wave growth theory. On the other hand, chorus propagated coherently outside plasmasphere can also be the origin of HISS. Recently, Magnetospheric Multiscale mission and Van Allen Probes provide unprecedented opportunity to uncover the nonlinear behavior and connections of these two important waves. In this presentation, we propose a very good event of multiple satellite observations from MMS and VAP to present the temporal and spatial variation of coherent rising tone elements of chorus and HISS in magnetopause. High-resolution wave, particle and field measurements are used here to show the evolution between these two waves near the plasmapause. The results have been compared with theoretical calculations and strongly suggest that nonlinear theory is important in controlling electron physics in radiation belts.