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Abstract:

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.

Registro:

Documento: Artículo
Título:Evidence for nonlinear development of magnetohydrodynamic scale intermittency in the inner heliosphere
Autor:Greco, A.; Matthaeus, W.H.; D'Amicis, R.; Servidio, S.; Dmitruk, P.
Filiación:Dipartimento di Fisica, Università della Calabria, Rende, Italy
Bartol Research Institute, Department of Physics and Astronomy, University of Delaware, DE, United States
INAF-Istituto di Fisica Dello Spazio Interplanetario, Rome, Italy
Departamento de Física, FCEyN, Ciudad Universitaria, Pabellón 1, Buenos Aires, Argentina
Palabras clave:magnetohydrodynamics (MHD); solar wind; turbulence
Año:2012
Volumen:749
Número:2
DOI: http://dx.doi.org/10.1088/0004-637X/749/2/105
Título revista:Astrophysical Journal
Título revista abreviado:Astrophys. J.
ISSN:0004637X
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_0004637X_v749_n2_p_Greco.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v749_n2_p_Greco

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Citas:

---------- APA ----------
Greco, A., Matthaeus, W.H., D'Amicis, R., Servidio, S. & Dmitruk, P. (2012) . Evidence for nonlinear development of magnetohydrodynamic scale intermittency in the inner heliosphere. Astrophysical Journal, 749(2).
http://dx.doi.org/10.1088/0004-637X/749/2/105
---------- CHICAGO ----------
Greco, A., Matthaeus, W.H., D'Amicis, R., Servidio, S., Dmitruk, P. "Evidence for nonlinear development of magnetohydrodynamic scale intermittency in the inner heliosphere" . Astrophysical Journal 749, no. 2 (2012).
http://dx.doi.org/10.1088/0004-637X/749/2/105
---------- MLA ----------
Greco, A., Matthaeus, W.H., D'Amicis, R., Servidio, S., Dmitruk, P. "Evidence for nonlinear development of magnetohydrodynamic scale intermittency in the inner heliosphere" . Astrophysical Journal, vol. 749, no. 2, 2012.
http://dx.doi.org/10.1088/0004-637X/749/2/105
---------- VANCOUVER ----------
Greco, A., Matthaeus, W.H., D'Amicis, R., Servidio, S., Dmitruk, P. Evidence for nonlinear development of magnetohydrodynamic scale intermittency in the inner heliosphere. Astrophys. J. 2012;749(2).
http://dx.doi.org/10.1088/0004-637X/749/2/105