Počet záznamů: 1
EMIC Waves Converted From Equatorial Noise Due to M/Q=2 Ions in the Plasmasphere: Observations From Van Allen Probes and Arase
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SYSNO ASEP 0511925 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název EMIC Waves Converted From Equatorial Noise Due to M/Q=2 Ions in the Plasmasphere: Observations From Van Allen Probes and Arase Tvůrce(i) Miyoshi, Y. (JP)
Matsuda, S. (JP)
Kurita, S. (JP)
Nomura, K. (JP)
Keika, K. (JP)
Shoji, M. (JP)
Kitamura, N. (JP)
Kasahara, Y. (JP)
Matsuoka, A. (JP)
Shinohara, I. (JP)
Shiokawa, K. (JP)
Machida, S. (JP)
Santolík, Ondřej (UFA-U) RID, ORCID
Boardsen, S.A. (US)
Horne, R. B. (GB)
Wygant, J.F. (US)Celkový počet autorů 16 Zdroj.dok. Geophysical Research Letters. - : Wiley - ISSN 0094-8276
Roč. 46, č. 11 (2019), s. 5662-5669Poč.str. 8 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova EMIC ; magnetsonic waves ; Arase ; Van Allen Probes ; plasmasphere ; Q=2 ions ; M Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech Obor OECD Fluids and plasma physics (including surface physics) Způsob publikování Open access Institucionální podpora UFA-U - RVO:68378289 UT WOS 000477616200004 EID SCOPUS 85067680130 DOI https://doi.org/10.1029/2019GL083024 Anotace Equatorial noise (EN) emissions are observed inside and outside the plasmapause. EN emissions are referred to as magnetosonic mode waves. Using data from Van Allen Probes and Arase, we found conversion from EN emissions to electromagnetic ion cyclotron (EMIC) waves in the plasmasphere and in the topside ionosphere. A low-frequency part of EN emissions becomes EMIC waves through branch splitting of EN emissions, and the mode conversion from EN to EMIC waves occurs around the frequency of M/Q = 2 (deuteron and/or alpha particles) cyclotron frequency. These processes result in plasmaspheric EMIC waves. We investigated the ion composition ratio by characteristic frequencies of EN emissions and EMIC waves and obtained ion composition ratios. We found that the maximum composition ratio of M/Q = 2 ions is similar to 10% below 3,000 km. The quantitative estimation of the ion composition will contribute to improving the plasma model of the deep plasmasphere and the topside ionosphere. Pracoviště Ústav fyziky atmosféry Kontakt Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Rok sběru 2020 Elektronická adresa https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019GL083024
Počet záznamů: 1