The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 36 Issue 1
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- Pages.29.2-29.2
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- 2011
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- 1226-2692(pISSN)
Statistical Properties of Flare Variability, Energy, and Frequency in Low-Mass Stars
- Chang, Seo-Won (Department of Astronomy, Yonsei University) ;
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Byun, Yong-Ik
(Department of Astronomy, Yonsei University)
- Published : 2011.04.05
Abstract
Although stellar flares have a long history of observations, there are few concrete understanding about underlying physical processes and meaningful correlations with other stellar properties. Most of previous observations dealt with only a small number of sample stars, and therefore not sufficient to support generalized statistical studies. Based on one-month long MMT time-series observations of the open cluster M37, we monitored light variations of nearly 2,500 M-dwarf stars and successfully identified 606 flare events from 422 stars. This is a rare attempt to estimate true flare rates and properties among many stars of the same age and mass group. For each flare, we considered both observational and physical parameters including flare shape, duration before and after the peak, baseline magnitude before and after the peak, peak magnitudes, total energy and peak energy, etc. We find significant correlations between some of key parameters over a wide range of energy (
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