Počet záznamů: 1
Observations of the First Harmonic of Saturn Kilometric Radiation During Cassini's Grand Finale
- 1.
SYSNO ASEP 0561095 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Observations of the First Harmonic of Saturn Kilometric Radiation During Cassini's Grand Finale Tvůrce(i) Wu, S. (CN)
Zarka, P. (FR)
Lamy, L. (FR)
Taubenschuss, Ulrich (UFA-U) RID, ORCID
Cecconi, B. (FR)
Ye, S. (CN)
Fischer, G. (AT)
Kurth, W. S. (US)
Francez, T. (FR)Celkový počet autorů 9 Číslo článku e2022JA030776 Zdroj.dok. Journal of Geophysical Research-Space Physics. - : Wiley - ISSN 2169-9380
Roč. 127, č. 9 (2022)Poč.str. 12 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova electron-cyclotron maser ; auroral radio emissions ; source region ; generation ; acceleration Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika Obor OECD Astronomy (including astrophysics,space science) CEP GF20-06802L GA ČR - Grantová agentura ČR Způsob publikování Open access Institucionální podpora UFA-U - RVO:68378289 UT WOS 000850891100001 EID SCOPUS 85139061512 DOI 10.1029/2022JA030776 Anotace Clear first harmonic emissions of Saturn Kilometric Radiation are discovered during the Cassini Grand Finale orbits. Both ordinary (O) and extraordinary (X) mode fundamental emissions accompanied by X mode harmonics are observed. Analysis shows that the frequency ratio between the fundamental and harmonic emissions is 2.01 +/- 0.08, and the harmonic emissions display weaker intensities than the fundamental, by 30-40 dB for the X-X (fundamental-harmonic) type harmonic and 10-30 dB for the O-X type harmonic. The intensity relations between the two types of harmonics, that is, O-X and X-X show different patterns that we attribute to different conditions of emission at the source. Direction-finding results shows that the fundamental and harmonic emissions are plausibly generated in the same source region. In agreement with previous studies at Earth, the generation of the two types of harmonics can be attributed to the cyclotron maser instability operating with different plasma density and electron energy distributions in the source region. 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 2023 Elektronická adresa https://hal.science/hal-03807514/document
Počet záznamů: 1