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Abstract:

The first direct determination of the inertial range energy cascade rate, using an anisotropic form of Yaglom's law for magnetohydrodynamic turbulence, is obtained in the solar wind with multispacecraft measurements. The two-point mixed third-order structure functions of Elsässer fluctuations are integrated over a sphere in magnetic field-aligned coordinates, and the result is consistent with a linear scaling. Therefore, volume integrated heating and cascade rates are obtained that, unlike previous studies, make only limited assumptions about the underlying spectral geometry of solar wind turbulence. These results confirm the turbulent nature of magnetic and velocity field fluctuations in the low frequency limit, and could supply the energy necessary to account for the nonadiabatic heating of the solar wind. © 2011 American Physical Society.

Registro:

Documento: Artículo
Título:Anisotropic third-moment estimates of the energy cascade in solar wind turbulence using multispacecraft data
Autor:Osman, K.T.; Wan, M.; Matthaeus, W.H.; Weygand, J.M.; Dasso, S.
Filiación:Bartol Research Institute, Department of Physics and Astronomy, University of Delaware, DE 19716, United States
University of California, Institute for Geophysics and Planetary Physics, Los Angeles, CA 90095, United States
Instituto de Astronomía y Física Del Espacio (CONICET-UBA), Departamento de Física (FCEN-UBA), 1428 Buenos Aires, Argentina
Palabras clave:Direct determination; Energy cascade; Linear scaling; Low frequency limits; Magnetohydrodynamic turbulence; Non-adiabatic; Solar-wind turbulence; Structure functions; Third-order; Two-point; Velocity field; Anisotropy; Heating; Magnetic fields; Magnetohydrodynamics; Solar wind; Spheres; Turbulence; Velocity; Solar energy
Año:2011
Volumen:107
Número:16
DOI: http://dx.doi.org/10.1103/PhysRevLett.107.165001
Título revista:Physical Review Letters
Título revista abreviado:Phys Rev Lett
ISSN:00319007
CODEN:PRLTA
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_00319007_v107_n16_p_Osman.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319007_v107_n16_p_Osman

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Citas:

---------- APA ----------
Osman, K.T., Wan, M., Matthaeus, W.H., Weygand, J.M. & Dasso, S. (2011) . Anisotropic third-moment estimates of the energy cascade in solar wind turbulence using multispacecraft data. Physical Review Letters, 107(16).
http://dx.doi.org/10.1103/PhysRevLett.107.165001
---------- CHICAGO ----------
Osman, K.T., Wan, M., Matthaeus, W.H., Weygand, J.M., Dasso, S. "Anisotropic third-moment estimates of the energy cascade in solar wind turbulence using multispacecraft data" . Physical Review Letters 107, no. 16 (2011).
http://dx.doi.org/10.1103/PhysRevLett.107.165001
---------- MLA ----------
Osman, K.T., Wan, M., Matthaeus, W.H., Weygand, J.M., Dasso, S. "Anisotropic third-moment estimates of the energy cascade in solar wind turbulence using multispacecraft data" . Physical Review Letters, vol. 107, no. 16, 2011.
http://dx.doi.org/10.1103/PhysRevLett.107.165001
---------- VANCOUVER ----------
Osman, K.T., Wan, M., Matthaeus, W.H., Weygand, J.M., Dasso, S. Anisotropic third-moment estimates of the energy cascade in solar wind turbulence using multispacecraft data. Phys Rev Lett. 2011;107(16).
http://dx.doi.org/10.1103/PhysRevLett.107.165001