The local interstellar magnetic field predictions from the MHD model and VOYAGERS' data

Details The local interstellar magnetic field predictions from the MHD model and VOYAGERS' data The local interstellar magnetic field predictions from the MHD model and VOYAGERS' data

Mar 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1216..580r&link_type=abstract

TWELFTH INTERNATIONAL SOLAR WIND CONFERENCE. AIP Conference Proceedings, Volume 1216, pp. 580-583 (2010).

Physics

Shock Wave Effects, Solar Wind, Magnetohydrodynamics, Interplanetary Magnetic Fields, Planetary Bow Shocks, Interplanetary Shocks, Particle Emission, Solar Wind, Magnetohydrodynamics And Plasmas, Interplanetary Magnetic Fields

Scientific paper

The termination shock (TS) crossings by Voyager 1 (V1) and Voyager 2 (V2) revealed the asymmetry of the heliosphere. Crossings took place at distances 94 AU and 84 AU, respectively, in two different times, on December 16, 2004-V1, and on August 30, 2007-V2. However both occurred on the declining phase of the previous 11-year solar cycle. The asymmetry may result from the solar wind dynamic pressure asymmetry or from the shock motion or from the local interstellar magnetic field (LIMF) asymmetric pressure. The question arises: if the interstellar magnetic field were the only factor responsible for the measured asymmetries, is it possible to find such a shape of the TS, which would reflect the real positions of V1 and V2 when they crossed the shock? Using our 3D MHD time dependent code we simulate the heliosphere/interstellar medium interactions for several different combinations of physical parameters in an attempt to answer this question. The results obtained places a substantial constraint on the orientation and magnitude of the interstellar magnetic field.

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