Balancing Act: The Role of The Interstellar Magnetic Field and Neutral H in Voyager 1 and 2 Asymmetries

Details Balancing Act: The Role of The Interstellar Magnetic Field and Neutral H in Voyager 1 and 2 Asymmetries Balancing Act: The Role of The Interstellar Magnetic Field and Neutral H in Voyager 1 and 2 Asymmetries

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsh14a..07o&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SH14A-07

Physics

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

Scientific paper

We present results from recently developed 5 fluid MHD model (4 neutral fluids and 1 ionized fluid). We present a benchmark comparison between our model and the kinetic Moscow model for the case of strong interstellar magnetic field, and no interplanetary field. The presence of neutral H, as pointed out by previous works, has the effect of diminishing the global heliospheric asymmetries. With a stronger interstellar field, however, the asymmetries are increased. Results of the 5-fluid MHD model have been employed as an starting point for a new kinetic-MHD model that combines the BATS-R-US MHD code with the 3D Monte- Carlo Moscow code. We present first results of this new coupled model. We discuss these results and compare with our previous work (Opher et al. 2006, 2007). Our goal is to constrain the orientation and intensity of the interstellar magnetic field that can satisfy the different constraints from the observed asymmetries (energetic particles streaming (east- west); the 10AU differences between V1 and V2 crossing; radio emission; and neutral H deflection).

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