A burst model for line emission in the solar atmosphere. III - A reassessment of the assumptions of constant pressure and steady state coronal equilibrium in the solar transition region

Details A burst model for line emission in the solar atmosphere. III - A reassessment of the assumptions of constant pressure and steady state coronal equilibrium in the solar transition region A burst model for line emission in the solar atmosphere. III - A reassessment of the assumptions of constant pressure and steady state coronal equilibrium in the solar transition region

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...404..799f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 404, no. 2, p. 799-804.

Astronomy and Astrophysics

Astrophysics

23

Line Spectra, Solar Atmosphere, Solar Corona, Solar Spectra, Stellar Models, Electron Density (Concentration), Solar Flares

Scientific paper

We investigate the temperature dependence of the electron densities inferred from various spectral line diagnostics for the quiet sun, two active regions, and the 1973 June 15 flare, all observed by NRL instruments on Skylab. We find that the common assumption of constant pressure in these solar regions is very poor, especially for the quiet sun and the active regions, and that a constant density assumption is much closer to the observations. Such a conclusion is not contradicted by the morphology of these regions, as observed by the HRTS instrument. We also investigate the variation of the nonthermal mass motion with departures of the line formation temperature from that corresponding to ionization equilibrium.

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