TY - JOUR
T1 - Electromagnetic Ion Cyclotron Waves Detected by Kaguya and Geotail in the Earth's Magnetotail
AU - Nakagawa, Tomoko
AU - Nishino, Masaki N.
AU - Tsunakawa, Hideo
AU - Takahashi, Futoshi
AU - Shibuya, Hidetoshi
AU - Shimizu, Hisayoshi
AU - Matsushima, Masaki
AU - Saito, Yoshifumi
N1 - Funding Information:
The authors thank the Kaguya MAP-LMAG and MAP-PACE teams for the Kaguya magnetic field and plasma particle data, and the Geotail MGF team and LEP team for the Geotail magnetic field data and the low-energy particle data. The authors are grateful to I. Shinohara for his help in using Geotail data, and Y. Harada for producing the Kaguya MAP-PACE spectrogram. The authors are thankful to H. Kawano for his helpful suggestions. We also thank two reviewers for their helpful comments for the manuscript. This study was in part supported by the JSPS KAKENHI grant 24540480. The Kaguya MAP-LMAG and MAP-PACE data are available at Kaguya (SELENE) Data Archive (http://l2db.selene. darts.isas.jaxa.jp/index.html.en). The Geotail data are available at DARTS/Geotail (https://www.darts. isas.jaxa.jp/stp/geotail/).
PY - 2018/2
Y1 - 2018/2
N2 - Narrowband electromagnetic ion cyclotron waves first discovered by the Apollo 15 and 16 Lunar Surface Magnetometers were surveyed in the magnetic field data obtained by the Kaguya satellite at an altitude of ∼100 km above the Moon in the tail lobe and plasma sheet boundary layer of the Earth's magnetosphere. The frequencies of the waves were typically 0.7 times the local proton cyclotron frequency, and 75% of the waves were left hand polarized with respect to the background magnetic field. They had a significant compressional component and comprised several discrete packets. They were detected on the dayside, nightside, and above the terminator of the Moon, irrespective of the lunar magnetic anomaly, or the magnetic connection to the lunar surface. The waves with the same characteristics were detected by Geotail in the absence of the Moon in the magnetotail. The most likely energy source of the electromagnetic ion cyclotron waves is the ring beam ions in the plasma sheet boundary layer.
AB - Narrowband electromagnetic ion cyclotron waves first discovered by the Apollo 15 and 16 Lunar Surface Magnetometers were surveyed in the magnetic field data obtained by the Kaguya satellite at an altitude of ∼100 km above the Moon in the tail lobe and plasma sheet boundary layer of the Earth's magnetosphere. The frequencies of the waves were typically 0.7 times the local proton cyclotron frequency, and 75% of the waves were left hand polarized with respect to the background magnetic field. They had a significant compressional component and comprised several discrete packets. They were detected on the dayside, nightside, and above the terminator of the Moon, irrespective of the lunar magnetic anomaly, or the magnetic connection to the lunar surface. The waves with the same characteristics were detected by Geotail in the absence of the Moon in the magnetotail. The most likely energy source of the electromagnetic ion cyclotron waves is the ring beam ions in the plasma sheet boundary layer.
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U2 - 10.1002/2017JA024505
DO - 10.1002/2017JA024505
M3 - Article
AN - SCOPUS:85041654214
VL - 123
SP - 1146
EP - 1164
JO - Journal of Geophysical Research: Space Physics
JF - Journal of Geophysical Research: Space Physics
SN - 2169-9380
IS - 2
ER -