Sliding periodogram of the temperature-binned RV time series of the Sun. Upper panels: total RV time series with the short-term interval used in Sect. 4.1 indicated by the gray shaded area. Right panels: GLS periodogram of the total time series, with the solar rotation period and its first harmonic indicated by the dashed lines. The columns of the central color maps show the GLS periodogram of every 100-day window, where darker colors indicate stronger power. The window is shifted in steps of one day, and gaps correspond to windows in which more than 25% of the data points are missing.