The evolution of active region loop plasma

Details The evolution of active region loop plasma The evolution of active region loop plasma

Nov 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...242..374k&link_type=abstract

Astrophysical Journal, Part 1, vol. 242, Nov. 15, 1980, p. 374-382. Research supported by the National Research Council;

Astronomy and Astrophysics

Astrophysics

22

Coronal Loops, Heat Flux, Mass Transfer, Solar Activity Effects, Solar Wind, Boundary Conditions, Boundary Value Problems, Chromosphere, Hydrodynamic Equations, Magnetohydrodynamic Stability, Solar Magnetic Field

Scientific paper

The adjustment of coronal active-region loops to changes in their heating rate is investigated numerically. The one-dimensional hydrodynamic equations are solved subject to boundary conditions in which heat flux-induced mass exchange between coronal and chromospheric components is allowed. The calculated evolution of physical parameters suggests that (1) mass supplied during chromospheric evaporation is much more effective in moderating coronal temperature excursions than when downward heat flux is dissipated by a static chromosphere, and (2) the method by which the chromosphere responds to changing coronal conditions can significantly influence coronal readjustment time scales. Observations are cited which illustrate the range of possible fluctuations in the heating rates.

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