Coronal mass ejections.
Abstract
The ejection of coronal mass by the sun is characterized, reviewing the results of recent observational and theoretical investigations. Topics discussed include the structure of loop-type ejections, the relatively low ejection speeds (less than the Alfven and gravitational speeds except near the solar maximum), the variation of occurrence rate with the solar cycle, and the association of ejections with prominence events, with or without flares. Consideration is given to numerical MHD simulations of ejection-initiation mechanisms (both impulsive-energy and coronal-structure-instability models), helmet structures, and the three-dimensional nature of the ejection loop. The value of coronal mass ejections as easily observable members of a larger class of astrophysical events (magnetized-plasma expulsion from gravitational wells) is indicated.
- Publication:
-
Highlights of Astronomy
- Pub Date:
- 1986
- Bibcode:
- 1986HiA.....7..743L
- Keywords:
-
- Coronal Loops;
- Solar Corona;
- Stellar Mass Ejection;
- Coronagraphs;
- Flow Velocity;
- Magnetohydrodynamics;
- Solar Prominences;
- Solar Physics;
- Mass Ejection:Solar Corona;
- Solar Corona:Mass Ejection