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Abstract:

Single point measurement turbulence cannot distinguish variations in space and time. We employ an ensemble of one- and two-point measurements in the solar wind to estimate the space-time correlation function in the comoving plasma frame. The method is illustrated using near Earth spacecraft observations, employing ACE, Geotail, IMP-8, and Wind data sets. New results include an evaluation of both correlation time and correlation length from a single method, and a new assessment of the accuracy of the familiar frozen-in flow approximation. This novel view of the space-time structure of turbulence may prove essential in exploratory space missions such as Solar Probe Plus and Solar Orbiter for which the frozen-in flow hypothesis may not be a useful approximation. © 2016 American Physical Society.

Registro:

Documento: Artículo
Título:Ensemble Space-Time Correlation of Plasma Turbulence in the Solar Wind
Autor:Matthaeus, W.H.; Weygand, J.M.; Dasso, S.
Filiación:Bartol Research Institute, Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, United States
Institute for Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095, United States
Instituto de Astronomía y Física Del Espacio (IAFE), Departamento de Ciencias de la Atmósfera y Los Océanos, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, 1428, Argentina
Palabras clave:Orbits; Plasma turbulence; Solar wind; Space flight; Correlation lengths; Correlation time; Single-point measurement; Solar Orbiters; Space and time; Space-time correlation; Space-time correlation function; Spacetime structures; Rain
Año:2016
Volumen:116
Número:24
DOI: http://dx.doi.org/10.1103/PhysRevLett.116.245101
Título revista:Physical Review Letters
Título revista abreviado:Phys Rev Lett
ISSN:00319007
CODEN:PRLTA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319007_v116_n24_p_Matthaeus

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Citas:

---------- APA ----------
Matthaeus, W.H., Weygand, J.M. & Dasso, S. (2016) . Ensemble Space-Time Correlation of Plasma Turbulence in the Solar Wind. Physical Review Letters, 116(24).
http://dx.doi.org/10.1103/PhysRevLett.116.245101
---------- CHICAGO ----------
Matthaeus, W.H., Weygand, J.M., Dasso, S. "Ensemble Space-Time Correlation of Plasma Turbulence in the Solar Wind" . Physical Review Letters 116, no. 24 (2016).
http://dx.doi.org/10.1103/PhysRevLett.116.245101
---------- MLA ----------
Matthaeus, W.H., Weygand, J.M., Dasso, S. "Ensemble Space-Time Correlation of Plasma Turbulence in the Solar Wind" . Physical Review Letters, vol. 116, no. 24, 2016.
http://dx.doi.org/10.1103/PhysRevLett.116.245101
---------- VANCOUVER ----------
Matthaeus, W.H., Weygand, J.M., Dasso, S. Ensemble Space-Time Correlation of Plasma Turbulence in the Solar Wind. Phys Rev Lett. 2016;116(24).
http://dx.doi.org/10.1103/PhysRevLett.116.245101