Mass flow and the validity of ionization equilibrium on the sun

Details Mass flow and the validity of ionization equilibrium on the sun Mass flow and the validity of ionization equilibrium on the sun

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979soph...64...57j&link_type=abstract

Solar Physics, vol. 64, Nov. 1979, p. 57-69.

Physics

Plasma Physics

9

Ionization, Mass Flow, Plasma Equilibrium, Solar Radiation, Emission Spectra, Graphs (Charts), Line Spectra, Magnetohydrodynamic Flow, Magnetohydrodynamic Stability, Plasma Physics, Stellar Models

Scientific paper

The results presented by Joselyn et al. (1979) for general astrophysical plasmas are applied to solar models. The objective is to investigate whether the reported solar flow velocities are compatible with the assumption of ionization equilibrium for several observed ionization stages for three specific static models of the solar atmosphere. These models are the coronal hole model of Munro and Withbroe (1972), the quiet sun model of Munro (1973) based on observations by Dupree and Reeves (1971), and the chromospheric network model of Gabriel (1976). These models are chosen for illustrative purposes. It is shown that the three models, representing different solar conditions, behave in a qualitatively similar manner, implying that the results are not particularly model dependent over the range of temperature gradients and electron densities thus far inferred for the sun. In view of the mass motions observed on the sun, the results strongly suggest caution in using the assumption of ionization for interpreting transition region spectra.

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