Mathematics – Logic
Scientific paper
Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...362..370s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 362, Oct. 10, 1990, p. 370-378. Research supported by the Ministero dell'Un
Mathematics
Logic
21
Coronal Loops, High Temperature Plasmas, Nonequilibrium Ionization, Plasma Density, Radiative Transfer, Solar Corona, Accretion Disks, Steady Flow, Steady State, Stellar Winds, Supernova Remnants, Thermal Stability
Scientific paper
The emissivity of the ions of carbon and oxygen has been recalculated for a set of solar coronal loop models with a steady state siphon flow. The ion densities were calculated from the plasma velocities, temperatures, and densities of the models, and large departures from equilibrium were found. For purposes of comparison, the emissivity was calculated with and without the approximation of ionization equilibrium. Considerable differences in the radiative loss function Lambda(T) curve between equilibrium and nonequilibrium conditions were found. The nonequilibrium Lambda(T) function was then used to solve again the steady state flow equations of the loop models. The differences in the structure of these models with respect to the models calculated adopting the Lambda(T) curve in equilibrium are discussed.
Antiochos Spiro K.
Lanzafame Giuseppe
Noci Giancarlo
Spadaro Daniele
Zappalà R. A.
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