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

Daniel Vech; Daniel Vech; Justin C. Kasper; Justin C. Kasper; Kristopher G. Klein; Jia Huang; Michael L. Stevens; Christopher H.K. Chen; Anthony W. Case; Kelly Korreck; Stuart D. Bale; Trevor A. Bowen; Phyllis L. Whittlesey; Roberto Livi; Davin E. Larson; David Malaspina; Marc Pulupa; John Bonnell; Peter Harvey; Keith Goetz; Thierry Dudok De Wit; Robert MacDowall

doi:10.3847/1538-4365/ab60a2

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

Daniel Vech, Daniel Vech, Justin C. Kasper, Justin C. Kasper, Kristopher G. Klein, Jia Huang, Michael L. Stevens, Christopher H.K. Chen, Anthony W. Case, Kelly Korreck, Stuart D. Bale, Trevor A. Bowen, Phyllis L. Whittlesey, Roberto Livi, Davin E. Larson, David Malaspina, Marc Pulupa, John Bonnell, Peter Harvey, Keith GoetzThierry Dudok De Wit, Robert MacDowall

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

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.

Original language	English (US)
Article number	52
Journal	Astrophysical Journal, Supplement Series
Volume	246
Issue number	2
DOIs	https://doi.org/10.3847/1538-4365/ab60a2
State	Published - Feb 2020

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/1538-4365/ab60a2

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Vech, D., Vech, D., Kasper, J. C., Kasper, J. C., Klein, K. G., Huang, J., Stevens, M. L., Chen, C. H. K., Case, A. W., Korreck, K., Bale, S. D., Bowen, T. A., Whittlesey, P. L., Livi, R., Larson, D. E., Malaspina, D., Pulupa, M., Bonnell, J., Harvey, P., ... MacDowall, R. (2020). Kinetic-scale Spectral Features of Cross Helicity and Residual Energy in the Inner Heliosphere. Astrophysical Journal, Supplement Series, 246(2), [52]. https://doi.org/10.3847/1538-4365/ab60a2

Vech, D, Vech, D, Kasper, JC, Kasper, JC, Klein, KG, Huang, J, Stevens, ML, Chen, CHK, Case, AW, Korreck, K, Bale, SD, Bowen, TA, Whittlesey, PL, Livi, R, Larson, DE, Malaspina, D, Pulupa, M, Bonnell, J, Harvey, P, Goetz, K, Dudok De Wit, T & MacDowall, R 2020, 'Kinetic-scale Spectral Features of Cross Helicity and Residual Energy in the Inner Heliosphere', Astrophysical Journal, Supplement Series, vol. 246, no. 2, 52. https://doi.org/10.3847/1538-4365/ab60a2

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title = "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. ",

author = "Daniel Vech and Daniel Vech and Kasper, {Justin C.} and Kasper, {Justin C.} and Klein, {Kristopher G.} and Jia Huang and Stevens, {Michael L.} and Chen, {Christopher H.K.} and Case, {Anthony W.} and Kelly Korreck and Bale, {Stuart D.} and Bowen, {Trevor A.} and Whittlesey, {Phyllis L.} and Roberto Livi and Larson, {Davin E.} and David Malaspina and Marc Pulupa and John Bonnell and Peter Harvey and Keith Goetz and {Dudok De Wit}, Thierry and Robert MacDowall",

note = "Publisher Copyright: {\textcopyright} 2020 The Author(s). Published by the American Astronomical Society..",

year = "2020",

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doi = "10.3847/1538-4365/ab60a2",

language = "English (US)",

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AU - Vech, Daniel

AU - Kasper, Justin C.

AU - Klein, Kristopher G.

AU - Huang, Jia

AU - Stevens, Michael L.

AU - Chen, Christopher H.K.

AU - Case, Anthony W.

AU - Korreck, Kelly

AU - Bale, Stuart D.

AU - Bowen, Trevor A.

AU - Whittlesey, Phyllis L.

AU - Livi, Roberto

AU - Larson, Davin E.

AU - Malaspina, David

AU - Pulupa, Marc

AU - Bonnell, John

AU - Harvey, Peter

AU - Goetz, Keith

AU - Dudok De Wit, Thierry

AU - MacDowall, Robert

PY - 2020/2

Y1 - 2020/2

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AB - 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.

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JF - Astrophysical Journal, Supplement Series

SN - 0067-0049

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M1 - 52

ER -

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

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