About the depth of formation of white-light emission in solar flares.

Details About the depth of formation of white-light emission in solar flares. About the depth of formation of white-light emission in solar flares.

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990bsold...8...79b&link_type=abstract

Byulletin Solnechnye Dannye Akademie Nauk USSR, No. 8/90, p. 79 - 84

Physics

1

Solar Flares: Models, Solar Chromosphere: Heating

Scientific paper

A set of models for white-light flares was calculated with a thin layer (6 - 12 km) in the low chromosphere. It is shown that the specific shape of Hα and Hβ line profiles, which white-light flares often have - the presence of very extended wings, is well explained by the deep position of the dense emitting layer (N = 1022cm-2). The white-light emission for the model with nH = 1016cm-3, T = 7300 - 7600K, N = 1022 equals to about 12%. The emission consists of two parts - emission from the dense chromospheric layer and emission from the photosphere. The possibility of heating the chromosphere emitting layer by energetic electrons and by X-ray is discussed.

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