TitleTHE VIOLATION OF THE TAYLOR HYPOTHESIS IN MEASUREMENTS OF SOLAR WIND TURBULENCE
Publication TypeJournal Article
Year of Publication2014
AuthorsKlein, KG, Howes, GG, TenBarge, JM
JournalThe Astrophysical Journal
Volume790
Issue2
PaginationL20
Date Published08/2014
ISSN2041-8205
KeywordsAstrophysics - Solar and Stellar Astrophysics; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; plasmas; Solar Probe Plus; Solar wind; turbulence; waves
Abstract

Motivated by the upcoming Solar Orbiter and Solar Probe Plus missions, qualitative and quantitative predictions are made for the effects of the violation of the Taylor hypothesis on the magnetic energy frequency spectrum measured in the near-Sun environment. The synthetic spacecraft data method is used to predict observational signatures of the violation for critically balanced Alfvénic turbulence or parallel fast/whistler turbulence. The violation of the Taylor hypothesis can occur in the slow flow regime, leading to a shift of the entire spectrum to higher frequencies, or in the dispersive regime, in which the dissipation range spectrum flattens at high frequencies. It is found that Alfvénic turbulence will not significantly violate the Taylor hypothesis, but whistler turbulence will. The flattening of the frequency spectrum is therefore a key observational signature for fast/whistler turbulence.

URLhttp://stacks.iop.org/2041-8205/790/i=2/a=L20?key=crossref.9873bcfbec22617b78b4a7d0cb1dbb95
DOI10.1088/2041-8205/790/2/L20
Short TitleApJ


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