Fig. 9
Cross-correlation function (CCF) map for DP CVn. The image is the average of four CCF maps obtained from cross-correlating the individual Doppler reconstructions (i.e., Ca i 6439 Å, Fe i 6430 Å, Fe i 6421 Å, and Fe i 6400 Å maps) taken in Apr. (ser1) and May (ser2). Dots with error bars are the Gaussian-fitted correlation peaks per 5° latitude bin. The best fit suggests an anti-solar differential rotation function (solid line) and corresponds to a surface shear α of − 0.035.
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