Flare event statistics on UV Ceti-type stars

Statistics – Computation

Scientific paper

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Dwarf Stars, Late Stars, Statistical Distributions, Stellar Flares, Variable Stars, Computational Astrophysics, Monte Carlo Method, Stellar Color, Stellar Luminosity, Ubv Spectra

Scientific paper

A statistical study of 228 flares on three UV Ceti-type stars, YZ CMi, AD Leo, and EV Lac, is presented. The study is based on observations made over a total monitoring time of 907 hr distributed over 18 years (1971-1988). Cumulative number distributions of flare event time-integrated energies are solved by a least-squares method on log-log plot for a power-law function to obtain both the constant alpha and the gradient beta, which are found to be similar among the three stars. The gradient showed that rare large flare events radiate most of the energy released by all the flare events in the monitoring time. The flare number rate and energy are found to be similar if the power-law distributions are extended up to a specific maximum energy.

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