Coronal closed structures. IV - Hydrodynamical stability and response to heating perturbations

Details Coronal closed structures. IV - Hydrodynamical stability and response to heating perturbations Coronal closed structures. IV - Hydrodynamical stability and response to heating perturbations

Jan 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...252..791p&link_type=abstract

Astrophysical Journal, Part 1, vol. 252, Jan. 15, 1982, p. 791-799. Research supported by the Smithsonian Institution and Consi

Astronomy and Astrophysics

Astrophysics

126

Brightness Distribution, Coronal Loops, Magnetohydrodynamic Stability, Solar Corona, Solar Temperature, Atmospheric Models, Conservation Equations, Flow Stability, Plasma Density, Plasma Temperature, Solar Magnetic Field, Stellar Structure, Temperature Distribution, Time Dependence

Scientific paper

The response of magnetically confined atmospheres to perturbations in the temperature and density distribution, and the local heating rate by means of a one-dimensional time-dependent hydrodynamical code, which incorporates the full energy, momentum and mass conservation equations is studied. These studies extend the linear instability analysis of Habbal and Rosner (1979) into the finite-amplitude regime, and generalize the confined atmosphere models of Serio et al., to the time-dependent domain. The results show that closed coronal atmospheres are stable against finite-amplitude perturbations if the chromospheric response is taken into account; and observed correlated increases in coronal density and temperature can only be achieved under quiescent conditions by increasing the heat deposition rate relatively more in the chromosphere than in the corona.

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