Differential rotation signatures from 2006 to 2012. Analyzing the ccf maps in Fig. D.1 reveals a weak solar-like differential rotation. The dots are the correlation peaks per 5°-latitude bin and their error bars are defined as the FWHMs of the corresponding Gaussians. The dashed line represents a fit using Eq. (5), whereas the solid line represents a fit using Eq. (6). The parameters for each fit are summarized in Table 5.