Which mechanisms dissipate turbulence in the solar wind
In plain words
Several processes can turn turbulent wave energy into particle heat without collisions, such as particles moving in step with waves or being pushed around by strong fluctuations. Their relative importance in the solar wind is unknown.
Precise statement
Quantify the fractions of cascade power dissipated by Landau damping, transit-time damping, ion-cyclotron resonance, stochastic heating, and reconnection in thin current sheets, for solar-wind plasma between 0.1 and 1 AU. An answer is a measured partition using field-particle correlation diagnostics, consistent with kinetic simulations.
What would settle it
Field-particle correlation analyses of high-cadence spacecraft data giving each channel's share with uncertainties.
Status in the literature
Field-particle correlation identified electron Landau damping in magnetosheath turbulence in 2019; a full partition is lacking.