A Catalog of M-dwarf Flares with ASAS-SN
A Catalog of M-dwarf Flares with ASAS-SN
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DOI：
10.3847/1538-4357/ab793a
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发表时间：
2019-12
期刊：
影响因子：
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通讯作者：
R. Rodríguez Martínez;L. Lopez;B. Shappee;S. Schmidt;T. Jayasinghe;C. Kochanek;K. Auchettl;T. Hol
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文献类型：
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作者：
R. Rodríguez Martínez;L. Lopez;B. Shappee;S. Schmidt;T. Jayasinghe;C. Kochanek;K. Auchettl;T. Hol
我们分析了1376颗早到晚的M矮星附近的光曲线，以寻找白光耀斑，使用全天超新星自动探测的光度学方法。我们使用一种简单的统计算法来搜索V波段通量的突然增加，从而确定了至少有一次潜在耀斑的480M矮星。经过更详细的评估，我们确定了62颗恒星上的62个单独耀斑。事件的幅度从磁感应强度到磁感应强度。利用经典耀斑模型，我们对耀斑能量进行了下限，得到了横跨ERG的V带能量。耀斑恒星的比例随着光谱类型的增加而增加，大多数耀斑恒星表现出中到强的H-α发射。此外，我们还发现62颗耀斑恒星中有14颗是自转变星，它们的自转周期比非耀斑自转变星M矮星的自转周期更短，H-α发射更强。
We analyzed the light curves of 1376 early-to-late, nearby M dwarfs to search for white-light flares using photometry from the All-Sky Automated Survey for Supernovae. We identified 480 M dwarfs with at least one potential flare employing a simple statistical algorithm that searches for sudden increases in V-band flux. After more detailed evaluation, we identified 62 individual flares on 62 stars. The event amplitudes range from mag. Using classical flare models, we place lower limits on the flare energies and obtain V-band energies spanning erg. The fraction of flaring stars increases with spectral type, and most flaring stars show moderate to strong Hα emission. Additionally, we find that 14 of the 62 flaring stars are rotational variables, and they have shorter rotation periods and stronger Hα emission than nonflaring rotational variable M dwarfs.