Neutral atom emission coming from the direction of the high-latitude magnetopause under northward IMF
スポンサーリンク
概要
- 論文の詳細を見る
The Low Energy Neutral Atom (LENA) imager on the Imager for Magnetopause-to-Aurora Global Exploration (IMAGE) spacecraft in the magnetosphere can detect neutral particles coming from the direction of the magnetopause. During a period of dynamic pressure of 〜6 nPa and IMF B_Z of 〜15nT on March 27, 2001, significant neutral atom emissions occurred in the direction of the very high-latitude magnetopause. Simultaneous observations from IMAGE/LENA and SuperDARN radar show that the LENA emission appears concurrently with the enhancement of the sunward flow of the reverse convection in the ionosphere. In a recent paper (S. Taguchi et al., Geophys. Res. Lett., 33, L03101, doi: 10.1029/2005GL025020, 2006) this type of emission has been interpreted as being produced by the fast ion flow caused by cusp reconnection through charge exchange with the Earth's hydrogen exosphere. In other words, remote sensing using LENA imager can be applied in order to determine the stability of the reconnection site. From results of analyses of LENA emission data we show that the reconnection "spot" mapped on a sphere having a radius of 8 R_E shifts tailward by approximately 1 R_E over 10min while fluctuating.
著者
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Taguchi Satoshi
Department Of Physics Faculty Of Science Tohoku University
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Sato Natsuo
National Institude of Polar Research
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Moore Thomas
Nasa Goddard Space Flight Center
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Hosokawa Keisuke
Department of Information and Communication Engineering
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Yukimatu Akira
National Institute of Polar Research
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Sato Natsuo
National Institute Of Polar Research
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Murata Yozo
Sugadaira Space Radio Observatory University Of Electro-communications
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Nakao Akira
Department Of Information And Communication Engineering University Of Electro-communications
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Collier Michael
Nasa Goddard Space Flight Center
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Hosokawa Keisuke
Department Of Information And Communication Engineering University Of Electro-communications
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Taguchi Satoshi
Department Of Information And Communication Engineering University Of Electro-communications
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NAKAO Akira
Department of Electronics, Graduate School of Engineering, Osaka University
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