Počet záznamů: 1  

First observation of rising-tone magnetosonic waves

  1. 1.
    0438269 - ÚFA 2015 RIV US eng J - Článek v odborném periodiku
    Fu, H. S. - Cao, J. B. - Zhima, Z. - Khotyaintsev, Y. V. - Angelopoulos, V. - Santolík, Ondřej - Omura, Y. - Taubenschuss, U. - Chen, L. - Huang, S. Y.
    First observation of rising-tone magnetosonic waves.
    Geophysical Research Letters. Roč. 41, č. 21 (2014), s. 7419-7426. ISSN 0094-8276. E-ISSN 1944-8007
    Grant CEP: GA MŠMT 7E12026; GA MŠMT(CZ) LH11122
    Institucionální podpora: RVO:68378289
    Klíčová slova: equatorial noise * ring distributions * cluster * propagation * emissions * region * themis * chorus
    Kód oboru RIV: DG - Vědy o atmosféře, meteorologie
    Impakt faktor: 4.196, rok: 2014
    http://onlinelibrary.wiley.com/doi/10.1002/2014GL061867/abstract

    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.
    Trvalý link: http://hdl.handle.net/11104/0241714

     
     
Počet záznamů: 1  

  Tyto stránky využívají soubory cookies, které usnadňují jejich prohlížení. Další informace o tom jak používáme cookies.