Počet záznamů: 1
First observation of rising-tone magnetosonic waves
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SYSNO ASEP 0438269 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název First observation of rising-tone magnetosonic waves Tvůrce(i) Fu, H. S. (CN)
Cao, J. B. (CN)
Zhima, Z. (CN)
Khotyaintsev, Y. V. (SE)
Angelopoulos, V. (US)
Santolík, Ondřej (UFA-U) RID, ORCID
Omura, Y. (JP)
Taubenschuss, U. (SE)
Chen, L. (US)
Huang, S. Y. (CH)Zdroj.dok. Geophysical Research Letters. - : Wiley - ISSN 0094-8276
Roč. 41, č. 21 (2014), s. 7419-7426Poč.str. 17 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova equatorial noise ; ring distributions ; cluster ; propagation ; emissions ; region ; themis ; chorus Vědní obor RIV DG - Vědy o atmosféře, meteorologie CEP 7E12026 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy LH11122 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora UFA-U - RVO:68378289 UT WOS 000345518300002 EID SCOPUS 84912060870 DOI https://doi.org/10.1002/2014GL061867 Anotace Magnetosonic (MS) waves are linearly polarized emissions confined near the magnetic equator with wave normal angle near 90 degrees and frequency below the lower hybrid frequency. Such waves, also termed equatorial noise, were traditionally known to be "temporally continuous" in their time-frequency spectrogram. Here we show for the first time that MS waves actually have discrete wave elements with rising-tone features in their spectrogram. The frequency sweep rate of MS waves, similar to 1 Hz/s, is between that of chorus and electromagnetic ion cyclotron (EMIC) waves. For the two events we analyzed, MS waves occur outside the plasmapause and cannot penetrate into the plasmasphere; their power is smaller than that of chorus. We suggest that the rising-tone feature of MS waves is a consequence of nonlinear wave-particle interaction, as is the case with chorus and EMIC waves. 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 2015
Počet záznamů: 1