Journal articles
Switchbacks in the Near-Sun Magnetic Field: Long Memory and Impact on the Turbulence Cascade
Thierry Dudok de Wit
1
Vladimir Krasnoselskikh
1
Stuart Bale
2
John Bonnell
2
Trevor Bowen
2
Christopher Chen
3
Clara Froment
1
Keith Goetz
Peter Harvey
Vamsee Krishna Jagarlamudi
1
Andrea Larosa
Robert Macdowall
David Malaspina
William Matthaeus
Marc Pulupa
Marco Velli
Phyllis Whittlesey
Thierry Dudok de Wit 1
Author IdHAL : thierry-dudok-de-wit ORCID : https://orcid.org/0000-0002-4401-0943
Vladimir Krasnoselskikh 1
Author Employer institution : Institut national des sciences de l'Univers
Stuart Bale 2
Author
John Bonnell 2
Author
Peter Harvey
Author
Vamsee Krishna Jagarlamudi 1
Author
Andrea Larosa
Author
Robert Macdowall
Author
Phyllis Whittlesey
Author
1
LPC2E - Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (3A, Avenue de la Recherche Scientifique 45071 Orléans cedex 2 - France)
- OSUC - Observatoire des Sciences de l'Univers en région Centre : UMS3116 (Campus Géosciences, 1A rue de la Férollerie, 45071 Orléans - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- CNRS - Centre National de la Recherche Scientifique : UMS3116 (France)
- UO - Université d'Orléans (Château de la Source - Avenue du Parc Floral - BP 6749 - 45067 Orléans cedex 2 - France)
- Observatoire de Paris (61 Av de l'Observatoire 75014 PARIS - France)
- PSL - Université Paris sciences et lettres (60 rue Mazarine 75006 Paris - France)
- CNES - Centre National d’Études Spatiales [Paris] : UMR 7328 (Siège social : 2 place Maurice Quentin, 75039 Paris - France)
2
University of California [Berkeley] (Berkeley, CA - United States)
- University of California (United States)
3
QMUL - Queen Mary University of London (Mile End Road, London E1 4NS - United Kingdom)
Abstract : One of the most striking observations made by Parker Solar Probe during its first solar encounter is the omnipresence of rapid polarity reversals in a magnetic field that is otherwise mostly radial. These so-called switchbacks strongly affect the dynamics of the magnetic field. We concentrate here on their macroscopic properties. First, we find that these structures are self-similar, and have neither a characteristic magnitude, nor a characteristic duration. Their waiting time statistics show evidence of aggregation. The associated long memory resides in their occurrence rate, and is not inherent to the background fluctuations. Interestingly, the spectral properties of inertial range turbulence differ inside and outside of switchback structures; in the latter the 1/f range extends to higher frequencies. These results suggest that outside of these structures we are in the presence of lower-amplitude fluctuations with a shorter turbulent inertial range. We conjecture that these correspond to a pristine solar wind.
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https://hal-insu.archives-ouvertes.fr/insu-02937575
Contributor : Nathalie Pothier <>
Submitted on : Monday, September 14, 2020 - 10:51:24 AM
Last modification on : Wednesday, September 23, 2020 - 4:36:29 AM
Contributor : Nathalie Pothier <>
Submitted on : Monday, September 14, 2020 - 10:51:24 AM
Last modification on : Wednesday, September 23, 2020 - 4:36:29 AM
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- HAL Id : insu-02937575, version 1
- DOI : 10.3847/1538-4365/ab5853
Citation
Thierry Dudok de Wit, Vladimir Krasnoselskikh, Stuart Bale, John Bonnell, Trevor Bowen, et al.. Switchbacks in the Near-Sun Magnetic Field: Long Memory and Impact on the Turbulence Cascade. Astrophysical Journal Supplement, American Astronomical Society, 2020, 246 (2), pp.39. ⟨10.3847/1538-4365/ab5853⟩. ⟨insu-02937575⟩
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