Cold Electron Temperature in the Inner Magnetosphere Estimated Through the Dispersion Relation of ECH Waves From the Arase Satellite Observations-Reference-Cited by-同舟云学术

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

Published:2024-06 Issue:6 Volume:59 Page:
ISSN:0048-6604
Container-title:Radio Science
language:en
Short-container-title:Radio Science

Author:

Taki Tomoe¹^ORCID,Kurita Satoshi²^ORCID,Kojima Hirotsugu²^ORCID,Kasahara Yoshiya³,Matsuda Shoya³^ORCID,Matsuoka Ayako⁴,Kazama Yoichi⁵^ORCID,Jun Chae‐Woo⁶^ORCID,Wang Shiang‐Yu⁵^ORCID,Tam Sunny W. Y.⁷^ORCID,Chang Tzu‐Fang⁷^ORCID,Wang Bo‐Jhou⁵,Miyoshi Yoshizumi⁶^ORCID,Shinohara Iku⁸^ORCID

Affiliation:

1. Graduate School of Engineering Kyoto University Kyoto Japan

2. Research Institute for Sustainable Humanosphere Kyoto University Kyoto Japan

3. Graduate School of Natural Science and Technology Kanazawa University Kanazawa Japan

4. Data Analysis Center for Geomagnetism and Space Magnetism Graduate School of Science Kyoto University Kyoto Japan

5. Academia Sinica Institute of Astronomy and Astrophysics Taipei Taiwan

6. Institute for Space‐Earth Environmental Research Nagoya University Nagoya Japan

7. Institute of Space and Plasma Sciences National Cheng Kung University Tainan Taiwan

8. Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Tokyo Japan

Abstract

AbstractWe 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.

Funder

Japan Science and Technology Agency

Japan Society for the Promotion of Science

Publisher

American Geophysical Union (AGU)

Link

https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2023RS007927

Reference28 articles.

1. Low-energy ions: A previously hidden solar system particle population

2. Nonconvective and convective electron cyclotron harmonic instabilities

3. The impact of cold electrons and cold ions in magnetospheric physics

4. Electrostatic solitary waves and electrostatic waves at the magnetopause