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SH: A statistical study of the compressible energy cascade rate in the solar wind: MAVEN and PSP observations – Brodiano

April 22 @ 12:00 pm 12:15 pm CMT

Turbulence is a unique nonlinear phenomenon in fluid and plasma flows that allows the transfer of energy between different temporal and spatial scales. For instance, the solar wind is observed to contain a turbulent cascade at different heliocentric distances from the Sun. Thanks to the availability of in situ measurements from various spacecraft missions, the solar wind provides a unique opportunity to investigate plasma turbulence. In the present work, we investigated the magnetohydrodynamics (MHD) energy cascade rate at the largest scales in the pristine solar wind at different heliocentric distances. Making use of magnetic field and plasma observations provided by Mars Atmosphere and Volatile EvolutioN (MAVEN) and Parker Solar Probe (PSP) missions, we estimated the incompressible and compressible cascade rates. Finally, we compared two different general exact law models for compressible isothermal and polytropic MHD turbulence.

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