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
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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
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Palabras clave: | Interplanetary medium; Magnetic fields; Solar wind; Turbulence |
Año: | 2010
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Volumen: | 721
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Número: | 1 PART 2
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Página de inicio: | L10
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Página de fin: | L13
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DOI: |
http://dx.doi.org/10.1088/2041-8205/721/1/L10 |
Título revista: | Astrophysical Journal Letters
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Título revista abreviado: | Astrophys. J. Lett.
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ISSN: | 20418205
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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