Image Details
Caption: Figure 2.
Wavelet analysis for the 4 yr light curve of Kepler-102. The top panel shows the photometry over 17 quarters of Kepler data, where time is measured in Barycentric TESS Julian Date. The central panel shows the time-variable frequency decomposition. The right panel shows the time-integrated wavelet power spectrum of the light curve. The clear period of maximum power is at 27 days, suggesting that this is the rotation period of the star, which we use to inform our GP kernel. There is also significant power from 10 to 32 days, showing that spots form, evolve, and disappear over time. The peak at 13 days is likely a half-period alias from spots appearing on opposite sides of the star (Haywood et al. 2014; Basri & Nguyen 2018).
Other Images in This Article
Copyright and Terms & Conditions
© 2023. The Author(s). Published by the American Astronomical Society.
