Lyman continuum as a diagnostic for nonthermal processes in solar flares.

Details Lyman continuum as a diagnostic for nonthermal processes in solar flares. Lyman continuum as a diagnostic for nonthermal processes in solar flares.

Jun 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...322..674d&link_type=abstract

Astronomy and Astrophysics, v.322, p.674-678

Astronomy and Astrophysics

Astrophysics

5

Sun: Chromosphere, Sun: Flares, Sun: Uv Radiation

Scientific paper

We have computed the Lyman continuum intensities for different flare circumstances, namely, the temperature rise in the chromosphere, the downward shift of the transition region, and the nonthermal effect of a precipitating beam of electrons. All the three factors can enhance the intensity by various amounts. The third effect additionally lowers the color temperature of the Lyman continuum. It thus provides a diagnostic tool to discriminate whether there exists an obvious nonthermal effect of electron beam bombardment during solar flares. It is also suggested that the relative magnitudes of Lyman and Balmer continuum enhancements can be used to infer the energy distribution type of the beam electrons.

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