IAFE 05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Magnetohydrodynamic turbulence in the solar wind
Autor/es:
DASSO, S.; RUIZ M.E.; MATTHAEUS, W.H.; WEYGAND, J. M.
Lugar:
La Plata
Reunión:
Conferencia; 52ª Reunión de la Asociación Argentina de Astronomía; 2009
Institución organizadora:
Asociación Argentina de Astronomía
Resumen:
The solar wind (SW) contains a very important level of fluctuations, which for large spatial scales can be studied in the framework of magnetohydrodynamic (MHD) turbulence. These fluctuations in the SW are usually anisotropic, and frequently present different properties in regions of the SW with different global magnetic connectivity (e.g., magnetic clouds) and/or different bulk plasma parameters. In this work we present a study of turbulent properties in the inner heliosphere as well as at one astronomical unit, based on modeling {it in situ} plasma and magnetic observations collected by the spacecraft Helios, Wind, and ACE. In particular we study the spatial anisotropy properties in the inertial range and also analyze the validity of the Taylor ´frozen-in-flow´ hypothesis, giving estimations for the decorrelation time scale for turbulent structures combining simultaneous and delayed observations from multi-spacecraft analysis.
