An Axisymmetric Magnetohydrodynamic Model for the Interaction of the Solar Wind with the Local Interstellar Medium

Details An Axisymmetric Magnetohydrodynamic Model for the Interaction of the Solar Wind with the Local Interstellar Medium An Axisymmetric Magnetohydrodynamic Model for the Interaction of the Solar Wind with the Local Interstellar Medium

Nov 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000astl...26..743a&link_type=abstract

Astronomy Letters, vol. 26, p. 743-749 (2000)

Astronomy and Astrophysics

Astronomy

26

Solar System, Heliosphere, Heliopause, Shock Waves, Interstellar Medium, Solar Wind, Interstellar Magnetic Field, Hydrogen Atoms

Scientific paper

We numerically analyze a magnetohydrodynamic, steady-state model for the interaction of a spherically symmetric solar wind with a three-component local interstellar medium (LISM), which is composed of plasma, hydrogen atoms, and a magnetic field. The magnetic field is assumed to be parallel to the velocity in the LISM. In this case, the model is axisymmetric. We study the effects of magnetic field on the plasma-flow geometry and on the distribution of hydrogen-atom parameters. In particular, we show that the presence of hydrogen atoms does not affect the qualitative change in the shape of the bow shock, the heliopause, and the solar-wind shock with increasing strength of the interstellar magnetic field. The presence of a magnetic field in the LISM can strongly affect the parameters of the energetic hydrogen atoms originated in the solar wind, although its effect on the "hydrogen wall" observed with the GHRS instrument onboard the HST spacecraft (Linsky and Wood 1996) is marginal.

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