Physics – Plasma Physics
Scientific paper
May 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.1235k&link_type=abstract
Geophysical Research Letters, Volume 26, Issue 9, p. 1235-1238
Physics
Plasma Physics
16
Magnetospheric Physics: Magnetopause, Cusp, And Boundary Layers, Space Plasma Physics: Discontinuities, Space Plasma Physics: Magnetic Reconnection, Space Plasma Physics: Numerical Simulation Studies
Scientific paper
The two-dimensional (2-D) magnetopause transition during reconnection is investigated with large-scale hybrid simulations. Contrary to previous studies, but in agreement with observations, the two discontinuities that form are not an intermediate shock or a slow shock. A 2-D reconnection configuration develops with jumps that do not satisfy Rankine-Hugoniot conditions of known discontinuities. All plasma quantities are fairly constant between the discontinuities. This region is characterized by a nearly unchanged sheath density, slight temperature enhancement, and significant magnetic field depression and thus resembles the ``Sheath Transition Layer'' of Song et al. [1989]. For a non-coplanar magnetic field Bzo, the plasma β attains very high values on the outflow side where Bzo and the Hall-generated field cancel, and the jet becomes unstable. In this case, the magnetosheath-side discontinuity resembles the often-observed rotational discontinuity.
Karimabadi Homa
Krauss-Varban Dietmar
Omidi Nojan
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