Dayside magnetopause reconnection

Details Dayside magnetopause reconnection Dayside magnetopause reconnection

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.1781h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Feb. 1, 1985, p. 1781-1785.

Other

15

Astronomical Models, Daytime, Magnetic Field Configurations, Magnetohydrodynamic Flow, Magnetopause, Space Plasmas, Atmospheric Boundary Layer, Compressible Flow, Magnetohydrodynamic Waves, Plasma Acceleration, Shock Waves, Two Dimensional Flow

Scientific paper

The Petschek model of magnetic field line reconnection is generalized for magnetopause-like conditions to enable a comparison of data and theory. The two-dimensional, compressible MHD model considered reveals four discontinuities which are necessary to match the different magnetic fields and plasma parameters inside and outside the magnetopause. The magnetosheath plasma is accelerated and deflected by a large-amplitude Alfven (rotational) wave and either a slow shock or a slow rarefaction wave (slow expansion fan). Another slow shock focuses the plasma flow from the magnetospheric side. A contact discontinuity inside the boundary layer separates the plasma flows from magnetosheath and magnetosphere. Using realistic magnetopause parameters, the results are illustrated by numerical examples and discussed in connection with geophysical observations.

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