Počet záznamů: 1
Relation between fine structure of energy spectra for pulsating aurora electrons and frequency spectra of whistler mode chorus waves
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SYSNO ASEP 0451774 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Relation between fine structure of energy spectra for pulsating aurora electrons and frequency spectra of whistler mode chorus waves Tvůrce(i) Miyoshi, Y. (JP)
Saito, S. (JP)
Seki, K. (JP)
Nishiyama, T. (JP)
Kataoka, R. (JP)
Asamura, K. (JP)
Katoh, Y. (JP)
Ebihara, Y. (JP)
Sakanoi, T. (JP)
Hirahara, M. (JP)
Oyama, S. (JP)
Kurita, S. (JP)
Santolík, Ondřej (UFA-U) RID, ORCIDCelkový počet autorů 13 Zdroj.dok. Journal of Geophysical Research-Space Physics. - : Wiley - ISSN 2169-9380
Roč. 120, č. 9 (2015), s. 7728-7736Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova pulsating aurora ; chorus waves ; wave-particle interactions ; computer simulation ; Reimei satellite Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech CEP LH12231 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora UFA-U - RVO:68378289 UT WOS 000363876800043 EID SCOPUS 84945156671 DOI 10.1002/2015JA021562 Anotace We investigate the origin of the fine structure of the energy spectrum of precipitating electrons for the pulsating aurora (PsA) observed by the low-altitude Reimei satellite. The Reimei satellite achieved simultaneous observations of the optical images and precipitating electrons of the PsA from satellite altitude (~620 km) with resolution of 40 ms. The main modulation of precipitation, with a few seconds, and the internal modulations, with a few hertz, that are embedded inside the main modulations are identified above ~3 keV. Moreover, stable precipitations at ~1 keV are found for the PsA. A “precipitation gap” is discovered between two energy bands. We identify the origin of the fine structure of the energy spectrum for the precipitating electrons using the computer simulation on the wave-particle interaction between electrons and chorus waves. The lower band chorus (LBC) bursts cause the main modulation of energetic electrons, and the generation and collapse of the LBC bursts determines on-off switching of the PsA. A train of rising tone elements embedded in the LBC bursts drives the internal modulations. A close set of upper band chorus (UBC) waves causes the stable precipitations at ~1 keV. 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 2016
Počet záznamů: 1