Magnetic activity of M dwarf stars from the LAMOST DR10 medium-resolution survey

Open Access

Fig. 6

Equivalent width (EW) of the Hα line variation statistics. The left panel shows the distribution statistics of δEW_Hα ( $δ E W_{H α} = E W_{m a x} - E W_{m i n} > 3 \sqrt{σ_{m a x}^{2} + σ_{m i n}^{2}}$ $\delta$$EW_{H\alpha}$ =\break $EW_{max}$ - $EW_{min}$ $>$3$\sqrt{\sigma_{max}^2+\sigma_{min}^2}$ ) for each star. The right panel presents the distribution statistics of R_EW for each subspectral type, and the black line represents the median R_EW (R_EW=EW_max/EW_min) value for each subspectral type.

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