Statistical Study of Kinetic Scale Wave Properties Inside Fluid-Scale Kelvin-Helmholtz Waves

Thomas Moore, Katariina Nykyri, Andrew P. Dimmock

Research output: Contribution to conferencePresentation

Abstract

Understanding the origins of plasma heating and transport from the turbulent magnetosheath into the magnetotail, and the dawn-dusk asymmetry of cold-component plasma sheet ions is one of the pending problems in space physics. In our recent work we show evidence of a new cross-scale energy transport mechanism explaining how cold flow energy in solar wind is transported into heat energy of ions via macroscopic Kelvin-Helmholtz waves that in their non-linear stage can radiate ion-scale magnetosonic modes with sufficient energy to provide observed level of ion heating. These results might prove to have a far reaching impact on systems where velocity shears exist such as astrophysical and laboratory plasmas. As an extension to these recent results, we explore the properties of kinetic ion-scale waves during hundreds of individual magnetopause crossings from six KHI events and compare with wave properties when KH waves are absent.
Original languageAmerican English
StatePublished - Dec 12 2016
EventAmerican Geophysical Union Fall Meeting - New Orleans, LA
Duration: Dec 15 2017 → …

Conference

ConferenceAmerican Geophysical Union Fall Meeting
Period12/15/17 → …

Keywords

  • magnetosheath
  • Kelvin-Helmholtz waves
  • plasma heating

Disciplines

  • Astrophysics and Astronomy

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