The solar coronal mass ejection of 20-21 November, 1973

Details The solar coronal mass ejection of 20-21 November, 1973 The solar coronal mass ejection of 20-21 November, 1973

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988soph..116..349m&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 116, no. 2, 1988, p. 349-367.

Physics

3

Solar Activity, Solar Corona, Stellar Mass Ejection, Coronal Loops, Equations Of Motion, Magnetohydrodynamic Waves, Solar Gravitation, Transient Response

Scientific paper

Studies of the distribution of the coronal material with time indicate that the coronal transient event of 20 - 21 November is a mass ejection event, involving about 1×1015g of material from the lower corona. It is associated with chromospheric activity in a region near longitude E68. The 20 - 21 November event is most simply described as an axisymmetric-cylindrical or conical volume, the boundaries of which remain constant over the events' lifetime. Densities are found to range from 3×10-16g cm-3 at 2.1 R_sun; heliocentric height early in the event to 1×10-18g cm-3 at 4.0 R_sun; late in the event. A model with modest mass flux typified by material speed u0 ⪉ 50 km s-1 and a near balance between the event's pressure gradient force and gravity - with possibly a small hydromagnetic wave contribution to the total pressure - is consistent with the observations. The kinetic energy is only about 1026ergs.

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