Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsh21a0482p&link_type=abstract
American Geophysical Union, Fall Meeting 2002, abstract #SH21A-0482
Physics
2724 Magnetopause, Cusp, And Boundary Layers, 2736 Magnetosphere/Ionosphere Interactions, 2740 Magnetospheric Configuration And Dynamics, 2760 Plasma Convection, 2794 Instruments And Techniques, 2124 Heliopause And Solar Wind Termination, 2144 Interstellar Gas
Scientific paper
Uncertainties in the value of the magnetic field in the local interstellar cloud and its direction with respect to the solar system ecliptic plane stimulate the analysis of the solar wind (SW)--interstellar medium (LISM) interaction problem, where these quantities act as free parameters. The range of their variation is defined by available observation data interpreted on the basis of different theoretical models describing the origin and evolution of the interstellar cloud. Most previously obtained results dealt with magnetic field values below 3 microgauss. Since the LISM flow is super-fast magnetosonic in this case, the heliospheric interface involves two shock waves: a SW termination shock and a bow shock. Conversely, for stronger magnetic fields Parker's solution for the supersonic source inflow into the uniformly magnetized interstellar gas at rest contains only a termination shock. Crossing it, the solar wind moves along the symmetry axis to infinity pushing aside magnetic field lines. There exist strong physical arguments in favor of substantially sub-Alfvenic LISM velocities nearly parallel to the magnetic field direction. We study the axially symmetric SW--LISM interaction under such conditions both in the purely MHD and two-fluid model including the presence of the LISM neutral particles. We found that the solution is in many aspects similar to Parker's. In order to reveal its consistency with currently available observation data, an analysis is presented of the neutral particle distribution throughout the heliosphere.
Cox Donald P.
Florinski Vladimir
Pogorelov Nikolai V.
Zank Gary P.
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