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Volume 34, issue 4
Ann. Geophys., 34, 393-398, 2016
https://doi.org/10.5194/angeo-34-393-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 34, 393-398, 2016
https://doi.org/10.5194/angeo-34-393-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

ANGEO Communicates 07 Apr 2016

ANGEO Communicates | 07 Apr 2016

Wave–particle resonance condition test for ion-kinetic waves in the solar wind

Y. Narita1,2, E. Marsch3, C. Perschke2,4, K.-H. Glassmeier2,5, U. Motschmann4,6, and H. Comişel4,7 Y. Narita et al.
  • 1Space Research Institute, Austrian Academy of Sciences, Schmiedlstr. 6, 8042 Graz, Austria
  • 2Institut für Geophysik und extraterrestrische Physik, Technische Universität Braunschweig, Mendelssohnstr. 3, 38106 Braunschweig, Germany
  • 3Institut für Experimentelle und Angewandte Physik, Christian-Albrechts Universität Kiel, Leibnizstr. 11, 24118 Kiel, Germany
  • 4Institut für Theoretische Physik, Technische Universität Braunschweig, Mendelssohnstr. 3, 38106 Braunschweig, Germany
  • 5Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, 37077 Göttingen, Germany
  • 6Deutsches Zentrum für Luft- und Raumfahrt, Institut für Planetenforschung, Rutherfordstr. 2, 12489 Berlin, Germany
  • 7Institute for Space Sciences, Atomiştilor 409, P.O. Box MG-23, Bucharest-Măgurele, 077125, Romania

Abstract. Conditions for the Landau and cyclotron resonances are tested for 543 waves (identified as local peaks in the energy spectra) in the magnetic field fluctuations of the solar wind measured by the Cluster spacecraft on a tetrahedral scale of 100km. The resonance parameters are evaluated using the frequencies in the plasma rest frame, the parallel components of the wavevectors, the ion cyclotron frequency, and the ion thermal speed. The observed waves show a character of the sideband waves associated with the ion Bernstein mode, and are in a weak agreement with the fundamental electron cyclotron resonance in spite of the ion-kinetic scales. The electron cyclotron resonance is likely taking place in solar wind turbulence near 1AU (astronomical unit).

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