Physics
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982soph...81..325d&link_type=abstract
Solar Physics, vol. 81, Dec. 1982, p. 325-338.
Physics
2
Atmospheric Models, Condensing, Coronal Loops, Solar Prominences, Stellar Models, Atmospheric Density, Radiative Heat Transfer, Solar Physics, Thermal Instability, Transient Response
Scientific paper
A model of filament formation based on the condensation of coronal arches is described. The condensation results from initiating the radiative instability within an arch by superimposing a transient energy supply upon the steady state heating mechanism. The transient energy supply increases the density within the arch so that when it is removed the radiative losses are sufficient to lead to cooling below the minimum in the power loss curve. Times from the initial formation of the condensation to its temperature stabilization as a cool filament have been calculated for various initial conditions. They lie in the range 10,000-100,000 s with the majority of the time spent above a temperature of 1 x 10 to the 6th K. Under the assumption that the condensation of a single arch forms an element of the filament, a complete filament requires the condensation of an arcade of loops. Using experimentally derived parameters, filament densities of 10 to the 11th to 10 to the 12th per cu cm can be obtained.
Davis Mark J.
Krieger Allen S.
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