The statistical analyses of flares detected in B band photometry of UV Ceti type stars

TL;DR

This study analyzes 222 flares from UV Ceti stars in the B band, classifying flare types, comparing with U band data, and deriving statistical properties and energy levels across different stars and spectral types.

Contribution

It introduces a detailed statistical analysis of B band flare data, classifies flares into fast and slow types, and compares properties with U band observations, providing new insights into flare characteristics.

Findings

Flares are classified into fast and slow types.

Equivalent durations differ by a factor of 16.2 between flare types.

Maximum flare energy varies with star and spectral type.

Abstract

In this study, we present the unpublished flare data collected from 222 flares detected in the B band observations of five stars and the results derived by statistical analysis and modeling of these data. Six basic properties have been found with a statistical analysis method applied to all models and analyses for the flares detected in the B band observation of UV Ceti type stars. We have also compared the U and B bands with the analysis results. This comparison allowed us to evaluate the methods used in the analyses. The analyses provided the following results. (1) The flares were separated into two types, fast and slow flares. (2) The mean values of the equivalent durations of the slow and the fast flares differ by a factor of 16.2 \pm 3.7. (3) Regardless of the total flare duration, the maximum flare energy can reach a different Plateau level for each star. (4) The Plateau values of EV Lac and EQ Peg are higher than the others. (5) The minimum values of the total flare duration increase toward the later spectral types. This value is called the Half-Life value in models. (6) Both the maximum flare rise times and the total flare duration obtained from the observed flares decrease toward the later spectral types.