Analysis of the optical spectra of solar flares. V - Sensitivity of the hydrogen Balmer signatures and of the Na-D2 line profile to different energy transport mechanisms

Details Analysis of the optical spectra of solar flares. V - Sensitivity of the hydrogen Balmer signatures and of the Na-D2 line profile to different energy transport mechanisms Analysis of the optical spectra of solar flares. V - Sensitivity of the hydrogen Balmer signatures and of the Na-D2 line profile to different energy transport mechanisms

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26as...84..601f&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 84, no. 3, Sept. 1990, p. 601-609.

Astronomy and Astrophysics

Astrophysics

4

Balmer Series, Energy Transfer, Light (Visible Radiation), Line Shape, Solar Flares, Solar Spectra, Deuterium, Electron Energy, H Gamma Line, Sodium, Solar Corona

Scientific paper

The effects of nonthermal electron flux, thermal conductive flux, and coronal pressure on the behavior of spectral signatures are investigated using various solar flare models. The method used to derive the Balmer and Na-D2 is described. It is observed that: a high value for the nonthermal electron flux is indicated by very broad wings of the Balmer lines and a well developed pseudocontinuum emission; a central emission reversal depicts a small coronal pressure value; and an intense Balmer line combined with a very weak Balmer continuum indicate a high coronal pressure value, but a low electron flux value. Changes in the Na-D2 line are detected only in the core of its profile. It is also detected that an increase in the conductive flux over a threshold level decreases both lines, the Balmer continuum, and the Na-D2 line core emission.

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