Hydrogen and helium excitation by EUV radiation for the production of white-light flares

Details Hydrogen and helium excitation by EUV radiation for the production of white-light flares Hydrogen and helium excitation by EUV radiation for the production of white-light flares

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988soph..115..277p&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 115, no. 2, 1988, p. 277-288.

Physics

6

Extreme Ultraviolet Radiation, Helium Hydrogen Atmospheres, Solar Atmosphere, Solar Flares, Chromosphere, Continuous Radiation, Emission Spectra, Lyman Spectra, Radiative Transfer, Solar Corona

Scientific paper

White-light flares are defined as those flares that produce significant enhancement of emission in the visible light continuum. The source of energy for this emission has not yet been identified. Using non-LTE radiative transfer calculations for hydrogen and helium in a simple model atmosphere the authors show that EUV (λ < 912 Å) radiation cannot be the main energy source for white-light flares. However, the EUV radiation can cause a significant enhancement of Hα emission.

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