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Abstract:

A method is devised for estimating the two-time correlation function and the associated Eulerian decorrelation timescale in turbulence.With the assumptions of a single decorrelation time and a frozen-in flow approximation for the single-point analysis, the method compares two-point correlation measurements with single-point correlation measurements at the corresponding spatial lag. This method is applied to interplanetarymagnetic fieldmeasurements from the Advanced Composition Explorer and Wind spacecraft. An average Eulerian decorrelation time of 2.9 hr is found. This measures the total rate of distortion of turbulent fluid elements-including sweeping, nonlinear distortion, and wave propagation. © 2010. The American Astronomical Society. All rights reserved.

Registro:

Documento: Artículo
Título:Eulerian decorrelation of fluctuations in the interplanetary magnetic field
Autor:Matthaeus, W.H.; Dasso, S.; Weygand, J.M.; Kivelson, M.G.; Osman, K.T.
Filiación:Bartol Research Institute, Department of Physics and Astronomy, University of Delaware, DE, United States
Instituto de Astronomía y Física Del Espacio (CONICET-UBA), Departamento de Física (FCEN-UBA), Buenos Aires, Argentina
Institute for Geophysics and Planetary Physics, University of California, Los Angeles, CA, United States
Palabras clave:Interplanetary medium; Magnetic fields; Solar wind; Turbulence
Año:2010
Volumen:721
Número:1 PART 2
Página de inicio:L10
Página de fin:L13
DOI: http://dx.doi.org/10.1088/2041-8205/721/1/L10
Título revista:Astrophysical Journal Letters
Título revista abreviado:Astrophys. J. Lett.
ISSN:20418205
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_20418205_v721_n1PART2_pL10_Matthaeus.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20418205_v721_n1PART2_pL10_Matthaeus

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Citas:

---------- APA ----------
Matthaeus, W.H., Dasso, S., Weygand, J.M., Kivelson, M.G. & Osman, K.T. (2010) . Eulerian decorrelation of fluctuations in the interplanetary magnetic field. Astrophysical Journal Letters, 721(1 PART 2), L10-L13.
http://dx.doi.org/10.1088/2041-8205/721/1/L10
---------- CHICAGO ----------
Matthaeus, W.H., Dasso, S., Weygand, J.M., Kivelson, M.G., Osman, K.T. "Eulerian decorrelation of fluctuations in the interplanetary magnetic field" . Astrophysical Journal Letters 721, no. 1 PART 2 (2010) : L10-L13.
http://dx.doi.org/10.1088/2041-8205/721/1/L10
---------- MLA ----------
Matthaeus, W.H., Dasso, S., Weygand, J.M., Kivelson, M.G., Osman, K.T. "Eulerian decorrelation of fluctuations in the interplanetary magnetic field" . Astrophysical Journal Letters, vol. 721, no. 1 PART 2, 2010, pp. L10-L13.
http://dx.doi.org/10.1088/2041-8205/721/1/L10
---------- VANCOUVER ----------
Matthaeus, W.H., Dasso, S., Weygand, J.M., Kivelson, M.G., Osman, K.T. Eulerian decorrelation of fluctuations in the interplanetary magnetic field. Astrophys. J. Lett. 2010;721(1 PART 2):L10-L13.
http://dx.doi.org/10.1088/2041-8205/721/1/L10