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Analysis of narrowband emission observed in the Saturn magnetosphere
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SYSNO ASEP 0332585 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Analysis of narrowband emission observed in the Saturn magnetosphere Překlad názvu Analýza úzkopásmové emise pozorované v magnetosféře Saturnu Tvůrce(i) Menietti, J. D. (US)
Ye, S. - Y. (US)
Yoon, P. H. (US)
Santolík, Ondřej (UFA-U) RID, ORCID
Rymer, A. M. (US)
Gurnett, D. A. (US)
Coates, A. J. (GB)Zdroj.dok. Journal of Geophysical Research - ISSN 0148-0227
Roč. 114, - (2009), A06206/1-A06206/13Poč.str. 13 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova narrowband emission ; Saturn magnetosphere ; Cassini Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech CEZ AV0Z30420517 - UFA-U, BC-A (2005-2011) UT WOS 000267003700004 DOI 10.1029/2008JA013982 Anotace Narrowband emission is observed at Saturn centered near 5 kHz and 20 kHz and harmonics of 20 kHz. This emission appears to be in many ways similar to Jovian narrowband emission observed at higher frequencies. We analyze one example of this emission near a possible source region. In situ electron distributions suggest narrowband emission has a source region associated with electrostatic cyclotron harmonic and upper hybrid emission. Linear growth rate calculations indicate that the observed plasma distributions are unstable to the growth of electrostatic harmonic emissions. In addition, it is found that when the local upper hybrid frequency is close to 2 fce or 3 fce (fce is the electron cyclotron frequency), electromagnetic Z mode and weak ordinary (O mode) emission can be directly generated by the cyclotron maser instability. In the presence of density gradients, Z mode emission can mode-convert into O mode emission, and this might explain the narrowband emission observed by the Cassini spacecraft. 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
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