The Orientation of the Local Interstellar Magnetic Field and Induced Asymmetries of the Heliosphere: Neutrals-MHD model

Details The Orientation of the Local Interstellar Magnetic Field and Induced Asymmetries of the Heliosphere: Neutrals-MHD model The Orientation of the Local Interstellar Magnetic Field and Induced Asymmetries of the Heliosphere: Neutrals-MHD model

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsh12b..03o&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SH12B-03

Physics

2124 Heliopause And Solar Wind Termination, 2126 Heliosphere/Interstellar Medium Interactions, 2134 Interplanetary Magnetic Fields, 2164 Solar Wind Plasma

Scientific paper

We present the results of a 3D Neutral-MHD model of the heliosphere. The neutrals are treated in a multi-fluid approach coupled to the ionized component by charge exchange. Comparisons are made with previous studies that showed that the local interstellar magnetic field introduces asymmetries in the heliosphere that are consistent with Voyager 1 and 2 observations of radio emissions and energetic particle streaming (Opher et al. Science 2007; Opher et al. ApJL 2006). We present, additionally, preliminary results of a 3D Kinetic-MHD model. The main advantage of this model is a rigorous kinetic description of interstellar H atoms, especially at the Bow Shock, Heliopause and Termination Shock interfaces. Differences of kinetic and multi-fluid approaches are discussed. The new model should provide refined estimates of the strength and direction of the local interstellar field and of the resulting distortions of the shape of the heliosphere.

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