Starspot evolution and flip-flop cycle from long-term photometry on a K-dwarf

Parameters of K-dwarf LO Peg derived from modelling have been shown. From top to bottom – (a) V-band light curve of LO Peg (open triangles) plotted with mean magnitude of each epoch (open diamonds). The shaded regions show the uncertainties in data points. (b) Phases/longitudes of spots recovered from light curve inversion. Filled and open circles show primary and secondary active longitudes, respectively. Vertical-shaded regions indicate the time intervals when the possible flip-flop events occur. (c) Recovered surface coverage of cool spots (per cent) on LO Peg. (d) The amplitude of brightness variations in unit of magnitude.

[Image Credit: Karmakar et al. (2016)]