Počet záznamů: 1
Oblique lower band chorus waves: Time shifts between discrete elements observed by the Cluster spacecraft
- 1.
SYSNO ASEP 0335031 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Oblique lower band chorus waves: Time shifts between discrete elements observed by the Cluster spacecraft Překlad názvu Šikmo se šířící chorové vlny spodního pásu: časové posuvy mezi diskrétními elemnty pozorovanými družicemi Cluster Tvůrce(i) Chum, Jaroslav (UFA-U) RID, ORCID
Santolík, Ondřej (UFA-U) RID, ORCID
Gurnett, D. A. (US)
Pickett, J. S. (US)Zdroj.dok. Journal of Geophysical Research - ISSN 0148-0227
Roč. 114, - (2009), A00F02/1-A00F02/13Poč.str. 13 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova plasma waves ; wave particle interaction ; inner magnetosphere ; radiation belt Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech CEP GA205/09/1253 GA ČR - Grantová agentura ČR IAA301120601 GA AV ČR - Akademie věd CEZ AV0Z30420517 - UFA-U, BC-A (2005-2011) UT WOS 000272946500001 DOI 10.1029/2009JA014366 Anotace We report observations of remarkable frequency differences and time shifts between the corresponding elements of lower band chorus recorded by the four Cluster spacecraft at low magnetic latitudes. Surprisingly, the spacecraft located closer to the equator systematically received the corresponding chorus elements later than the spacecraft located at higher magnetic latitudes. The time shifts and frequency differences depended almost linearly on the perpendicular distance between the various spacecraft. Analysis of data shows that chorus emissions were generated with highly oblique angles of propagation. We show that the sources moving across the magnetic field lines are reasonably consistent with these observations. We propose that the transverse motion of the chorus sources is a consequence of a feedback between the oblique waves and counter streaming electrons during nonlinear cyclotron interactions, and we provide an estimate of the transverse velocity of the source. 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 2010
Počet záznamů: 1