Evidence for nonlinear development of magnetohydrodynamic scale intermittency in the inner heliosphere

The formation of coherent structures in turbulence is a signature of a developing cascade and therefore might be observable by analyzing inner heliospheric solar wind turbulence. To test this idea, data from the Helios 2 mission, for six streams of solar wind at different heliocentric distances and...

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Detalles Bibliográficos
Autor principal: Dmitruk, Pablo Ariel
Publicado: 2012
Materias:
magnetohydrodynamics (MHD)
solar wind
turbulence
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v749_n2_p_Greco
http://hdl.handle.net/20.500.12110/paper_0004637X_v749_n2_p_Greco
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_0004637X_v749_n2_p_Greco
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spelling paper:paper_0004637X_v749_n2_p_Greco2023-06-08T14:29:04Z Evidence for nonlinear development of magnetohydrodynamic scale intermittency in the inner heliosphere Dmitruk, Pablo Ariel magnetohydrodynamics (MHD) solar wind turbulence The formation of coherent structures in turbulence is a signature of a developing cascade and therefore might be observable by analyzing inner heliospheric solar wind turbulence. To test this idea, data from the Helios 2 mission, for six streams of solar wind at different heliocentric distances and of different velocities, were subjected to statistical analysis using the partial variance of increments (PVI) approach. We see a clear increase of the PVI distribution function versus solar wind age for higher PVI cutoff, indicating development of non-Gaussian coherent structures. The plausibility of this interpretation is confirmed by a similar behavior observed in two-dimensional magnetohydrodynamics simulation data at corresponding dimensionless nonlinear times. © 2012. The American Astronomical Society. All rights reserved. Fil:Dmitruk, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v749_n2_p_Greco http://hdl.handle.net/20.500.12110/paper_0004637X_v749_n2_p_Greco
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic magnetohydrodynamics (MHD)
solar wind
turbulence
spellingShingle magnetohydrodynamics (MHD)
solar wind
turbulence
Dmitruk, Pablo Ariel
Evidence for nonlinear development of magnetohydrodynamic scale intermittency in the inner heliosphere
topic_facet magnetohydrodynamics (MHD)
solar wind
turbulence
description The formation of coherent structures in turbulence is a signature of a developing cascade and therefore might be observable by analyzing inner heliospheric solar wind turbulence. To test this idea, data from the Helios 2 mission, for six streams of solar wind at different heliocentric distances and of different velocities, were subjected to statistical analysis using the partial variance of increments (PVI) approach. We see a clear increase of the PVI distribution function versus solar wind age for higher PVI cutoff, indicating development of non-Gaussian coherent structures. The plausibility of this interpretation is confirmed by a similar behavior observed in two-dimensional magnetohydrodynamics simulation data at corresponding dimensionless nonlinear times. © 2012. The American Astronomical Society. All rights reserved.
author Dmitruk, Pablo Ariel
author_facet Dmitruk, Pablo Ariel
author_sort Dmitruk, Pablo Ariel
title Evidence for nonlinear development of magnetohydrodynamic scale intermittency in the inner heliosphere
title_short Evidence for nonlinear development of magnetohydrodynamic scale intermittency in the inner heliosphere
title_full Evidence for nonlinear development of magnetohydrodynamic scale intermittency in the inner heliosphere
title_fullStr Evidence for nonlinear development of magnetohydrodynamic scale intermittency in the inner heliosphere
title_full_unstemmed Evidence for nonlinear development of magnetohydrodynamic scale intermittency in the inner heliosphere
title_sort evidence for nonlinear development of magnetohydrodynamic scale intermittency in the inner heliosphere
publishDate 2012
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v749_n2_p_Greco
http://hdl.handle.net/20.500.12110/paper_0004637X_v749_n2_p_Greco
work_keys_str_mv AT dmitrukpabloariel evidencefornonlineardevelopmentofmagnetohydrodynamicscaleintermittencyintheinnerheliosphere
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