Physics
Scientific paper
Mar 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981soph...70..137w&link_type=abstract
Solar Physics, vol. 70, Mar. 1981, p. 137-148.
Physics
20
Coronal Loops, Dynamic Response, Magnetohydrodynamics, Radiative Heat Transfer, Solar Flares, Thermal Conductivity, Shock Fronts, Shock Wave Interaction, Solar Magnetic Field, Solar Physics
Scientific paper
A systematic study of the effects of thermal conduction and radiation (Cox-Tucker type) on the dynamic response of a coronal loop is presented. The study is based on a one-fluid hydrodynamic description of a magnetic flux loop subject to a sudden localized heating, simulating the flare energy release. Numerical results are obtained for the heating of a full loop at one end and symmetrical heating at both ends. The results show that: (1) the basic response is the propagation of a hydrodynamic shock; (2) thermal conduction (Coulomb type) has significant effects; and radiation has only minor influence unless the density exceeds 10 to the 11th per cu cm. It is noted that the uniform flaring of a loop is associated with heating of long duration. Short pulse-like heating results in the nonuniform brightening and propagation of luminous fronts similar to that sometimes observed in flare loops.
Kan L. C.
Nakagawa Yasuhiro
Tandberg-Hanssen Einar
Wu Shi Tsan
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