Transient ionization of the mesosphere during auroral breakup; Arase satellite and ground-based conjugate observations at Syowa Station

Kataoka, Ryuho*; Nishiyama, Takanori*; Tanaka, Yoshimasa*; Kadokura, Akira*; Uchida, Herbert Akihito*; Ebihara, Yusuke*; Ejiri, Mitsumu*; Tomikawa, Yoshihiro*; Tsutsumi, Masaki*; Sato, Kaoru*; Miyoshi, Yoshizumi*; Shiokawa, Kazuo*; Kurita, Satoshi*; Kasahara, Yoshiya*; Ozaki, Mitsunori*; Hosokawa, Keisuke*; Matsuda, Shoya*; Shinohara, Iku*; Takashima, Takeshi*; Sato, Tatsuhiko ; Mitani, Takefumi*; Hori, Tomoaki*; Higashio, Nana*

Transient ionization of the mesosphere was detected at around 65 km altitude during the isolated auroral expansion occurred at 2221-2226 UT on June 30, 2017. A general-purpose Monte Carlo particle transport code PHITS suggested that significant ionization is possible in the middle atmosphere due to auroral X-rays from the auroral electrons of 10 keV.

Language	:	English
Journal	:	Earth, Planets and Space (Internet)
Volume	:	71
Number	:	1
Pages	:	p.9_1 - 9_10
Publication Year/Month	:	2019/12
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Paper URL	:	https://doi.org/10.1186/s40623-019-0989-7
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Registration No. : AA20180093
JAEA Abstracts No. : 47000552
Paper Submission No. : 21184

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