Concave-outward slow shocks in coronal mass ejections

Details Concave-outward slow shocks in coronal mass ejections Concave-outward slow shocks in coronal mass ejections

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9515251s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Sept. 1, 1990, p. 15251-15256.

Physics

14

Lines Of Force, Magnetohydrodynamic Waves, Shock Wave Propagation, Solar Corona, Solar Magnetic Field, Stellar Mass Ejection, Concavity, Magnetic Field Configurations, Mathematical Models

Scientific paper

Formation of slow shocks in a simplified model corona consisting of closed magnetic field lines near the coronal base with overlying open magnetic field lines is analyzed. An increase in the magnetic field strength in the closed region is utilized to drive the corona outward, generating slow shocks for a suitable selection of parameters. The study demonstrates that concave-upward slow shocks can be formed in a magnetic environment, and provides evidence that nonlinear manifestations of all three wave modes (slow, intermediate, and fast) can occur as the corona adjusts from ambient conditions to those produced by the driver. The results show the existence of nonlinear disturbances due to all three wave modes in the coronal response to the expanding driver magnetic fields.

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