Skip to Main content Skip to Navigation
Journal articles

Kinetic-scale Spectral Features of Cross Helicity and Residual Energy in the Inner Heliosphere

Abstract : In this work, we present the first results from the flux angle (FA) operation mode of the Faraday Cup instrument on board the Parker Solar Probe (PSP). The FA mode allows rapid measurements of phase space density fluctuations close to the peak of the proton velocity distribution function with a cadence of 293 Hz. This approach provides an invaluable tool for understanding kinetic-scale turbulence in the solar wind and solar corona. We describe a technique to convert the phase space density fluctuations into vector velocity components and compute several turbulence parameters, such as spectral index, residual energy, and cross helicity during two intervals when the FA mode was used in PSP's first encounter at 0.174 au distance from the Sun.
Complete list of metadatas

Cited literature [51 references]  Display  Hide  Download

https://hal-insu.archives-ouvertes.fr/insu-02942545
Contributor : Nathalie Pothier <>
Submitted on : Friday, September 18, 2020 - 8:40:31 AM
Last modification on : Wednesday, September 23, 2020 - 4:35:55 AM

File

Vech_2020_ApJS_246_52.pdf
Publisher files allowed on an open archive

Licence


Distributed under a Creative Commons Attribution - NoDerivatives 4.0 International License

Identifiers

Collections

Citation

Daniel Vech, Justin C. Kasper, Kristopher G. Klein, Jia Huang, Michael L. Stevens, et al.. Kinetic-scale Spectral Features of Cross Helicity and Residual Energy in the Inner Heliosphere. Astrophysical Journal Supplement, American Astronomical Society, 2020, 246 (2), pp.52. ⟨10.3847/1538-4365/ab60a2⟩. ⟨insu-02942545⟩

Share

Metrics

Record views

52

Files downloads

28