PSP Bibliography



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On the Interpretation of Parker Solar Probe Turbulent Signals


AuthorBourouaine, Sofiane; Perez, Jean;
KeywordsParker Data Used
AbstractIn this Letter we propose a practical methodology to interpret future Parker Solar Probe (PSP) turbulent time signals even when Taylor s hypothesis is not valid. By extending Kraichnan s sweeping model used in hydrodynamics we derive the Eulerian spacetime correlation function in magnetohydrodynamic (MHD) turbulence. It is shown that in MHD, the temporal decorrelation of small-scale fluctuations arises from a combination of hydrodynamic sweeping induced by large-scale fluid velocity delta u(0) and by the Alfvenic propagation along the local magnetic field. The resulting temporal part of the spacetime correlation function is used to determine the field-perpendicular wavenumber range
Year of Publication2019
JournalASTROPHYSICAL JOURNAL LETTERS
Volume879
Number of PagesL16
Section
Date Published07/2019
ISBN
URL
DOI10.3847/2041-8213/ab288a