Spacetime Hall-MHD Turbulence at Sub-ion Scales: Structures or Waves?

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F21%3A00548950" target="_blank" >RIV/67985815:_____/21:00548950 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.3847/2041-8213/ac11fd" target="_blank" >https://doi.org/10.3847/2041-8213/ac11fd</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/2041-8213/ac11fd" target="_blank" >10.3847/2041-8213/ac11fd</a>

Result language
angličtina
Original language name
Spacetime Hall-MHD Turbulence at Sub-ion Scales: Structures or Waves?
Original language description
Spatiotemporal properties of two-dimensional (2D) Hall-magnetohydrodynamic (MHD) turbulence at intermediate plasma beta = 2 are studied by means of Fast Iterative Filtering (FIF), a new technique for the decomposition of nonstationary nonlinear signals. Results show that the magnetic energy at sub-ion scales is concentrated in perturbations with frequencies smaller than the ion-cyclotron (IC) frequency and with polarization properties that are incompatible with both kinetic Alfven waves (KAWs) and IC waves. At higher frequencies, we clearly identify signatures of both whistler waves and KAWs, however, their energetic contribution to the magnetic power spectrum is negligible. We conclude that the dynamics of 2D Hall-MHD turbulence at sub-ion scales is mainly driven by localized intermittent structures, with no significant contribution of wavelike fluctuations.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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