Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982ssrv...33..233d&link_type=abstract
(Lindau Workshop on the Source Region of the Solar Wind, 9th, Lindau, West Germany, Nov. 1981.) Space Science Reviews, vol. 33,
Astronomy and Astrophysics
Astrophysics
88
Coronal Loops, Solar Corona, Solar Terrestrial Interactions, Solar Wind, Magnetohydrodynamic Waves, Optical Measurement, Shock Waves, Solar Flares, Solar Maximum Mission, Solar Radio Bursts
Scientific paper
Solar coronal transients are important both for their role in solar-terrestrial interactions and as models of energetic astrophysical phenomena. Following a brief overview of the characteristics of the background solar wind, the present paper presents observations of typical coronal transients and theoretical approaches to the understanding of these phenomena. Observations obtained with the white-light coronagraphs on board the P78-1 and SMM satellites are presented which demonstrate spatial and temporal electron density changes, particularly in the case of a transient whose interplanetary shock wave was detected by two spacecraft, as well as the characteristics of eruptive prominences. Situations where optical measurements may be coupled (either directly or by inference) with type II and type IV radio burst observations are also considered. Finally, attention is given to models of transients based on (1) an association of the loop-shaped brightness enhancements with magnetic flux tubes; (2) the quasi-steady evolution of coronal magnetic fields in response to photospheric changes; and (3) the solution of the full set of magnetohydrodynamic equations
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