Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...233..577h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 233, no. 2, July 1990, p. 577-582. Research supported by EEC, SERC, Royal Soci
Astronomy and Astrophysics
Astrophysics
20
Astronomical Models, High Energy Electrons, Radiative Transfer, Solar Flares, Balmer Series, Chromosphere, Light Curve, Paschen Series, Solar Atmosphere
Scientific paper
It is shown that the nonthermal ionization of a solar flare atmosphere by beam bombardment can result, in the initial stages of a flare, in dimunitions in the continuum solar flare brightness (termed 'black light flares'). The most favorable conditions for observing this diagnostic phenomenon are investigated in terms of flare location and wavelength. In terms of bombarding beam parameters, electron beams of large peak flux are shown to be the most favorable as are target atmospheres with minimal preheating.
Aboudarham Jean
Brown John C.
Hénoux Jean-Claude
van den Oord H. J. G.
van Driel-Gesztelyi Lidia
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