22/08/2007 – 14h – Auditório Principal, Bloco G – IAG/USP

Merav Opher

George Mason University – Fairfax/VA, EUA

Título/Title: The Orientation of the Local Interstellar Magnetic Field

Resumo/Abstract:

The orientation of the local interstellar magnetic field introduces asymmetries in the solar system that affect the location of heliospheric radio emissions and the streaming direction of ions from the termination shock of the solar wind. We combine observations of radio emissions and energetic particle streaming with extensive 3D MHD computer simulations of magnetic field draping over the heliopause to show that the plane of the local interstellar field is ~ 60°-90° from the galactic plane. This suggests that the field orientation in the Local Interstellar Cloud differs from that of a larger scale interstellar magnetic field thought to parallel the galactic plane. We discuss this results and the implications for the turbulence in the local interstellar medium.

 

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