Rieger-type cycles on the solar-like star KIC 2852336

Context. A Rieger-type periodicity of 150–180 days (six to seven times the solar rotation period) has been observed in Sun’s magnetic activity and is probably connected with internal dynamo layer. Observations Rieger cycles other solar-like stars may give us information about action throughout stellar evolution. Aims. We aim use Sun as a star analogue find on using Kepler data. Methods. analyse light curve Sun-like KIC 2852336 (with period 9.5 days) wavelet generalised Lomb-Scargle methods periodicities over timescales. Results. Besides days, power spectrum shows pronounced peak at 61 (about six less 40–44 days. These two periods correspond can be explained by harmonics magneto-Rossby waves The theoretical properties lead estimation field strength 40 kG inside star. Conclusions. used probe solar-type different phases Comparing estimated corresponding values, we conclude that ratio Ω/ B D , where Ω angular velocity field, same for Sun. Therefore, conserved during evolution, which consistent earlier observations younger are more active.