Magnetic activity of RS CVn stars based on TESS and LAMOST surveys

Open Access

Fig. 15.

Examples of RS CVn stars exhibiting variability in $E W'_{H α}$ ${E{W\prime_{H\alpha}}}$ . Top two panels: Low-resolution spectra. Bottom two panels: Medium-resolution spectra. The stars, listed from top to bottom, are LAMOST J040754.00+175025.8, J034348.33+250015.7, J035425.23+242136.3, and J052210.34+243208.8, respectively. Within each pair of panels, the left panel shows the normalized spectra and the right panel the corresponding $E W'_{H α}$ ${E{W\prime_{H\alpha}}}$ values.

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