Compressive turbulent cascade and heating in the solar wind

Journal Article · Thu Mar 25 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3395825· OSTI ID:21371710

Marino, R ^[1]; Sorriso-Valvo, L ^[2]; Carbone, V ^[1]; Noullez, A ^[3]; Bruno, R ^[4]

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1. Dipartimento di Fisica, Universita della Calabria, Ponte Bucci 31C, I-87036 Rende (Italy)
2. Liquid Crystal Laboratory, INFM/CNR, Ponte Bucci 33B, I-87036 Rende (Italy)
3. University of Nice Sophia Antipolis, CNRS, Observatoire de la Cote d'Azur, B.P. 4229, 06304 Nice Cedex 4 (France)
4. INAF-Istituto Fisica Spazio Interplanetario, Rome (Italy)

A turbulent energy cascade has been recently identified in high-latitude solar wind data samples by using a Yaglom-like relation. However, analogous scaling law, suitably modified to take into account compressible fluctuations, has been observed in a much more extended fraction of the same data set recorded by the Ulysses spacecraft. Thus, it seems that large scale density fluctuations, despite their low amplitude, play a major role in the basic scaling properties of turbulence. The compressive turbulent cascade, moreover, seems to be able to supply the energy needed to account for the local heating of the non-adiabatic solar wind.

• OSTI ID: 21371710
• Journal Information: AIP Conference Proceedings, Vol. 1216, Issue 1; Conference: 12. international solar wind conference, Saint-Malo (France), 21-26 Jun 2009; Other Information: DOI: 10.1063/1.3395825; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
AMPLITUDES
ASTROPHYSICS
FLUCTUATIONS
MAGNETOHYDRODYNAMICS
PLASMA
PLASMA DENSITY
PLASMA HEATING
SCALING LAWS
SOLAR HEATING
SOLAR WIND
SPACE VEHICLES
TURBULENCE
FLUID MECHANICS
HEATING
HYDRODYNAMICS
MECHANICS
PHYSICS
SOLAR ACTIVITY
STELLAR ACTIVITY
STELLAR WINDS
VARIATIONS
VEHICLES