Characteristics of activity energetics of he UV Cet-type flare stars

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Energy Spectra, Flare Stars, Radiant Flux Density, Spectral Energy Distribution, Spectrum Analysis, Ultraviolet Spectra, Balmer Series, Light (Visible Radiation), Statistical Analysis, Stellar Coronas, Stellar Flares, Stellar Spectrophotometry

Scientific paper

The energetics of the sporadic flares, quiet chromospheres and coronae, and coronal spots, of UV Cet-type flare stars are quantitatively compared. A statistical analysis of about 1800 flares registered for 23 flare stars is the basis for the estimation of the time-averaged powers of flare optical radiation and the construction of the flare energy spectra. The specroscopic observation of 26 flare stars between flares is used to determine the total Balmer line radiation of quiet chromospheres. It is concluded that the total power of nonequilibrium processes in flare star atmospheres is near the total star spot radiation deficit in these stars.

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