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The Fine Temporal Structure of The EV Lacertae Flare on February 6, 1986 at the C IV (λl550 Å) Resonance Line II. Interpretation

Published online by Cambridge University Press:  27 September 2017

M.M. Katsova  and
M.A. Livshits
M.M. Katsova
Affiliation:
Sternberg State Astronomical Institute, University of Moscow, 119899 Moscow, USSR
M.A. Livshits
Affiliation:
Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation, Academy of Sciences Troitsk, 142092 Moscow Region, USSR

Abstract

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Flare optical continuum with duration above one minute is emitted by a gas condensation with T ≈ 104 K, which may form in a gas-dynamic process. The light carve slope implies that this flare consists of several elementary events. The features of the initial C IV line burst during one elementary event are determined by numerical simulation. The comparison of theoretical intensity and duration of the C IV burst with the observations of the EV Lac flare on February 6, 1986 shows that the observed elementary event in the C IV line is consistent with the formation of a radiative shock wave with an explosive evaporation of the chromosphere. The possibility of the appearance of C IV doublet emission, accompanying the entire process, is also discussed.

Type
Session I: Stellar Flares
Information
International Astronomical Union Colloquium , Volume 104 , Issue 2: Solar and Stellar Flares , 1989 , pp. 71 - 74
Copyright
Copyright © Kluwer 1989

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