The evolution of compressible solar wind turbulence in the inner heliosphere: PSP, THEMIS and MAVEN observations. (arXiv:2102.11781v1 [physics.space-ph])
<a href="http://arxiv.org/find/physics/1/au:+Andres_N/0/1/0/all/0/1">N. Andrés</a>, <a href="http://arxiv.org/find/physics/1/au:+Sahraoui_F/0/1/0/all/0/1">F. Sahraoui</a>, <a href="http://arxiv.org/find/physics/1/au:+Hadid_L/0/1/0/all/0/1">L. Z. Hadid</a>, <a href="http://arxiv.org/find/physics/1/au:+Huang_S/0/1/0/all/0/1">S. Y. Huang</a>, <a href="http://arxiv.org/find/physics/1/au:+Romanelli_N/0/1/0/all/0/1">N. Romanelli</a>, <a href="http://arxiv.org/find/physics/1/au:+Galtier_S/0/1/0/all/0/1">S. Galtier</a>, <a href="http://arxiv.org/find/physics/1/au:+DiBraccio_G/0/1/0/all/0/1">G. DiBraccio</a>, <a href="http://arxiv.org/find/physics/1/au:+Halekas_J/0/1/0/all/0/1">J. Halekas</a>
The first computation of the compressible energy transfer rate from $sim$
0.2 AU up to $sim$ 1.7 AU is obtained using PSP, THEMIS and MAVEN
observations. The compressible energy cascade rate $varepsilon_C$ is computed
for hundred of events at different heliocentric distances, for time intervals
when the spacecraft were in the pristine solar wind. The observational results
show moderate increases of $varepsilon_C$ with respect to the incompressible
cascade rate $varepsilon_I$. Depending on the level of compressibility in the
plasma, which reach up to 25 $%$ in the PSP perihelion, the different terms in
the compressible exact relation are shown to have different impact in the total
cascade rate $varepsilon_C$. Finally, the observational results are connected
with the local ion temperature and the solar wind heating problem.
The first computation of the compressible energy transfer rate from $sim$
0.2 AU up to $sim$ 1.7 AU is obtained using PSP, THEMIS and MAVEN
observations. The compressible energy cascade rate $varepsilon_C$ is computed
for hundred of events at different heliocentric distances, for time intervals
when the spacecraft were in the pristine solar wind. The observational results
show moderate increases of $varepsilon_C$ with respect to the incompressible
cascade rate $varepsilon_I$. Depending on the level of compressibility in the
plasma, which reach up to 25 $%$ in the PSP perihelion, the different terms in
the compressible exact relation are shown to have different impact in the total
cascade rate $varepsilon_C$. Finally, the observational results are connected
with the local ion temperature and the solar wind heating problem.
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