Cold Electron Temperature in the Inner Magnetosphere Estimated Through the Dispersion Relation of ECH Waves From the Arase Satellite Observations

Tomoe Taki, Satoshi Kurita, Hirotsugu Kojima, Yoshiya Kasahara, Shoya Matsuda, Ayako Matsuoka, Yoichi Kazama, Chae Woo Jun, Shiang Yu Wang, Sunny W.Y. Tam, Tzu Fang Chang, Bo Jhou Wang, Yoshizumi Miyoshi, Iku Shinohara

研究成果: Article同行評審

摘要

We have analyzed Electrostatic Electron Cyclotron Harmonic (ECH) waves observed using interferometry observation mode performed by the Arase satellite to estimate low-energy electron temperatures. Interferometry can be used to calculate velocities, but the Arase satellite can only perform interferometry observations in a one-dimensional direction. We proposed a method to estimate the wave vector of the observed ECH waves from the observed electric fields and calculated the phase velocity for each frequency. We determined the particle parameters from the particle detector and the upper hybrid resonance and estimated the unknown low-energy electron temperature from the agreement between the observed ECH dispersion relation and the theoretical dispersion curves. We performed our analysis for six events and found that the low-energy electron temperature in the observed region is on the order of 1 eV.

原文English
文章編號e2023RS007927
期刊Radio Science
59
發行號6
DOIs
出版狀態Published - 2024 6月

All Science Journal Classification (ASJC) codes

  • 凝聚態物理學
  • 一般地球與行星科學
  • 電氣與電子工程

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