M-dwarf sample studied in this work spans a range of ~1000 K in effective temperature and ~3 dex in activity levels as represented by the log values. The relative mass of each star is represented by the size of the circles, with a range from 0.12 to 0.61 M_⊙. The stellar rotation period is indicated by the colour of the circles, with a range from 1 to 145 days. The grey symbol represents a star with an unknown effective temperature; we show it as an active star in accordance with its log value. This plot shows 29 stars for which the log value is reported in this work. Meanwhile, the T_eff and stellar masses were extracted from literature.