Journal article
Constraining Ion-Scale Heating and Spectral Energy Transfer in Observations of Plasma Turbulence
Physical review letters, Vol.125(2), pp.1-025102
07/10/2020
DOI: 10.1103/PhysRevLett.125.025102
PMID: 32701332
Abstract
We perform a statistical study of the turbulent power spectrum at inertial and kinetic scales observed during the first perihelion encounter of the Parker Solar Probe. We find that often there is an extremely steep scaling range of the power spectrum just above the ion-kinetic scales, similar to prior observations at 1 A.U., with a power-law index of around -4. Based on our measurements, we demonstrate that either a significant (>50%) fraction of the total turbulent energy flux is dissipated in this range of scales, or the characteristic nonlinear interaction time of the turbulence decreases dramatically from the expectation based solely on the dispersive nature of nonlinearly interacting kinetic Alfven waves.
Details
- Title: Subtitle
- Constraining Ion-Scale Heating and Spectral Energy Transfer in Observations of Plasma Turbulence
- Creators
- Trevor A. Bowen - Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USAAlfred Mallet - University of California, BerkeleyStuart D. Bale - University of California, BerkeleyJ. W. Bonnell - University of California, BerkeleyAnthony W. Case - Smithsonian Astrophysical ObservatoryBenjamin D. G. Chandran - University of New HampshireAlexandros Chasapis - Laboratory for Atmospheric and Space PhysicsChristopher H. K. Chen - Queen Mary University of LondonDie Duan - Peking UniversityThierry Dudok De Wit - Université d'OrléansKeith Goetz - University of MinnesotaJasper S. Halekas - University of IowaPeter R. Harvey - University of California, BerkeleyJ. C. Kasper - University of MichiganKelly E. Korreck - Smithsonian Astrophysical ObservatoryDavin Larson - University of California, BerkeleyRoberto Livi - University of California, BerkeleyRobert J. MacDowall - Goddard Space Flight CenterDavid M. Malaspina - Laboratory for Atmospheric and Space PhysicsMichael D. McManus - Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USAMarc Pulupa - University of California, BerkeleyMichael Stevens - Smithsonian Astrophysical ObservatoryPhyllis Whittlesey - University of California, Berkeley
- Resource Type
- Journal article
- Publication Details
- Physical review letters, Vol.125(2), pp.1-025102
- DOI
- 10.1103/PhysRevLett.125.025102
- PMID
- 32701332
- NLM abbreviation
- Phys Rev Lett
- ISSN
- 0031-9007
- eISSN
- 1079-7114
- Publisher
- Amer Physical Soc
- Number of pages
- 8
- Grant note
- NNX17AI18G; 80NSSC19K0829; NNN06AA01C / NASA; National Aeronautics & Space Administration (NASA) ST/N003748/2; ST/T00018X/1 / STFC; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) Leverhulme Trust Visiting Professorship program; Leverhulme Trust ST/N003748/2 / STFC Ernest Rutherford Fellowship; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC)
- Language
- English
- Date published
- 07/10/2020
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984428798802771
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