EVIDENCE FOR NONLINEAR DEVELOPMENT OF MAGNETOHYDRODYNAMIC SCALE INTERMITTENCY IN THE INNER HELIOSPHERE

Greco, Antonella; Matthaeus, Wh; D'Amicis, R; Servidio, Sergio; Dmitruk, P.

doi:doi:10.1088/0004-637X/749/2/105

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.

EVIDENCE FOR NONLINEAR DEVELOPMENT OF MAGNETOHYDRODYNAMIC SCALE INTERMITTENCY IN THE INNER HELIOSPHERE / Greco, Antonella; Matthaeus, Wh; D'Amicis, R; Servidio, Sergio; Dmitruk, P.. - In: THE ASTROPHYSICAL JOURNAL. - ISSN 0004-637X. - 749(2012), pp. 1-9.

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Titolo:	EVIDENCE FOR NONLINEAR DEVELOPMENT OF MAGNETOHYDRODYNAMIC SCALE INTERMITTENCY IN THE INNER HELIOSPHERE
Autori:	GRECO, Antonella Matthaeus WH D'Amicis R SERVIDIO, Sergio Dmitruk P. mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2012
Rivista:	THE ASTROPHYSICAL JOURNAL
Citazione:	EVIDENCE FOR NONLINEAR DEVELOPMENT OF MAGNETOHYDRODYNAMIC SCALE INTERMITTENCY IN THE INNER HELIOSPHERE / Greco, Antonella; Matthaeus, Wh; D'Amicis, R; Servidio, Sergio; Dmitruk, P.. - In: THE ASTROPHYSICAL JOURNAL. - ISSN 0004-637X. - 749(2012), pp. 1-9.
Handle:	http://hdl.handle.net/20.500.11770/136068
Appare nelle tipologie:	1.1 Articolo in rivista

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