Cross-Energy Couplings from Magnetosonic Waves to Electromagnetic Ion Cyclotron Waves through Cold Ion Heating inside the Plasmasphere

Kazushi Asamura, Masafumi Shoji, Yoshizumi Miyoshi, Yoshiya Kasahara, Yasumasa Kasaba, Atsushi Kumamoto, Fuminori Tsuchiya, Shoya Matsuda, Ayako Matsuoka, Mariko Teramoto, Yoichi Kazama, Iku Shinohara

Research output: Contribution to journalArticlepeer-review

Abstract

Using a novel wave-particle interaction analysis, we show observational evidence of energy transfer from fast magnetosonic waves (MSWs) to low-energy protons in the magnetosphere. The analysis clearly indicates that the transferred proton energies are further converted to excite electromagnetic ion cyclotron waves. Since MSWs are excited by hot ions, cross-energy coupling of ions occurs through MSWs. The result also suggests a new energy transfer path of exciting electromagnetic ion cyclotron waves in the magnetosphere, and a complex interplay between various wave modes and particle populations.

Original languageEnglish
Article number245101
JournalPhysical review letters
Volume127
Issue number24
DOIs
Publication statusPublished - 2021 Dec 10

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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