Propagation of solar generated disturbances through the solar wind critical points - One-dimensional analysis

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Interplanetary Medium, Magnetohydrodynamic Waves, Shock Wave Propagation, Solar Activity Effects, Solar Wind, Critical Point, Hydrodynamic Equations, Solar Magnetic Field, Subsonic Speed

Scientific paper

The authors investigate the proper method for mathematically simulating the formation of an interplanetary disturbance (IPD) in the subsonic, sub-Alfvénic region near the solar surface within the constraints of one-dimensional hydrodynamic and magnetohydrodynamic analyses. They then numerically simulate the subsequent propagation of the IPD through the solar wind critical points in the equatorial plane to the outer corona. They conclude that physically realistic studies of the propagation of IPD which are assumed to originate near the solar surface must (1) initiate the IPD inside the critical points and (2) include the magnetic field. Although this conclusion is based on a one-dimensional analysis, the authors speculate that it would be equally valid in multi-dimensions.

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