Diffusion in the solar chromosphere-corona transition region

Details Diffusion in the solar chromosphere-corona transition region Diffusion in the solar chromosphere-corona transition region

Feb 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apl....17...27t&link_type=abstract

Astrophysical Letters, vol. 17, no. 1, 1976, p. 27-30.

Astronomy and Astrophysics

Astrophysics

30

Chromosphere, Electron Transitions, Ionic Diffusion, Solar Atmosphere, Solar Corona, Abundance, Equilibrium Equations, Line Spectra, Resonance

Scientific paper

The paper examines effects of radial diffusion on local ionization equilibrium in the solar chromosphere-corona transition region. Concentration, thermal, pressure, and force diffusion are the forms of diffusion included in the system. A transition-region temperature-density model is presented which accounts for diffusion and reproduces O VI and Fe IX resonance-line intensities consistent with observed values. In all cases considered, it is found that ions are pushed by diffusion to higher temperatures, although some return to their local ionization-equilibrium temperature positions after reaching 1 million K. It is also found that the element-to-proton abundance density ratio varies with height.

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