Visualization of rapid electron precipitation via chorus element wave–particle interactions

Mitsunori Ozaki (), Yoshizumi Miyoshi, Kazuo Shiokawa, Keisuke Hosokawa, Shin-ichiro Oyama, Ryuho Kataoka, Yusuke Ebihara, Yasunobu Ogawa, Yoshiya Kasahara, Satoshi Yagitani, Yasumasa Kasaba, Atsushi Kumamoto, Fuminori Tsuchiya, Shoya Matsuda, Yuto Katoh, Mitsuru Hikishima, Satoshi Kurita, Yuichi Otsuka, Robert C. Moore, Yoshimasa Tanaka, Masahito Nosé, Tsutomu Nagatsuma, Nozomu Nishitani, Akira Kadokura, Martin Connors, Takumi Inoue, Ayako Matsuoka and Iku Shinohara
Additional contact information
Mitsunori Ozaki: Kanazawa University
Yoshizumi Miyoshi: Nagoya University
Kazuo Shiokawa: Nagoya University
Keisuke Hosokawa: The University of Electro-Communications
Shin-ichiro Oyama: Nagoya University
Ryuho Kataoka: National Institute of Polar Research
Yusuke Ebihara: Kyoto University
Yasunobu Ogawa: National Institute of Polar Research
Yoshiya Kasahara: Kanazawa University
Satoshi Yagitani: Kanazawa University
Yasumasa Kasaba: Tohoku University
Atsushi Kumamoto: Tohoku University
Fuminori Tsuchiya: Tohoku University
Shoya Matsuda: Japan Aerospace Exploration Agency
Yuto Katoh: Tohoku University
Mitsuru Hikishima: Japan Aerospace Exploration Agency
Satoshi Kurita: Nagoya University
Yuichi Otsuka: Nagoya University
Robert C. Moore: University of Florida
Yoshimasa Tanaka: National Institute of Polar Research
Masahito Nosé: Nagoya University
Tsutomu Nagatsuma: National Institute of Information and Communications Technology
Nozomu Nishitani: Nagoya University
Akira Kadokura: National Institute of Polar Research
Martin Connors: Athabasca University
Takumi Inoue: Kanazawa University
Ayako Matsuoka: Japan Aerospace Exploration Agency
Iku Shinohara: Japan Aerospace Exploration Agency

Nature Communications, 2019, vol. 10, issue 1, 1-9

Abstract: Abstract Chorus waves, among the most intense electromagnetic emissions in the Earth’s magnetosphere, magnetized planets, and laboratory plasmas, play an important role in the acceleration and loss of energetic electrons in the plasma universe through resonant interactions with electrons. However, the spatial evolution of the electron resonant interactions with electromagnetic waves remains poorly understood owing to imaging difficulties. Here we provide a compelling visualization of chorus element wave–particle interactions in the Earth’s magnetosphere. Through in-situ measurements of chorus waveforms with the Arase satellite and transient auroral flashes from electron precipitation events as detected by 100-Hz video sampling from the ground, Earth’s aurora becomes a display for the resonant interactions. Our observations capture an asymmetric spatial development, correlated strongly with the amplitude variation of discrete chorus elements. This finding is not theoretically predicted but helps in understanding the rapid scattering processes of energetic electrons near the Earth and other magnetized planets.

Date: 2019
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DOI: 10.1038/s41467-018-07996-z

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