IAFE 05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
artículos
Título:
EULERIAN DECORRELATION OF FLUCTUATIONS IN THE INTERPLANETARY MAGNETIC FIELD
Autor/es:
MATTHAEUS, W.H.; DASSO, S.; WEYGAND, J. M.; KIVELSON M.G.; OSMAN, K.T.
Revista:
ASTROPHYSICAL JOURNAL
Editorial:
IOP PUBLISHING LTD
Referencias:
Año: 2010 vol. 721 p. 10 - 13
ISSN:
0004-637X
Resumen:
A method is devised for estimating the two-time correlation function and the associated Eulerian decorrelationtimescale in turbulence.With the assumptions of a single decorrelation time and a frozen-in flow approximation forthe single-point analysis, the method compares two-point correlation measurements with single-point correlationmeasurements at the corresponding spatial lag. This method is applied to interplanetarymagnetic fieldmeasurementsfrom the Advanced Composition Explorer and Wind spacecraft. An average Eulerian decorrelation time of 2.9 hris found. This measures the total rate of distortion of turbulent fluid elementsincluding sweeping, nonlineardistortion, and wave propagation.
