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Fig. 6


Simulated values of the photometric brightness change δ(b + y)/2 (upper panel) and S-index (lower panel) vs. stellar inclination i. Solid curves correspond to the solar distribution of active regions, dashed to polar distribution, and dotted to homogeneous distribution. The coverage by faculae and spots for all three distributions is chosen so that the S-index observed from the stellar equatorial plane (i = 90°) equals 0.19.

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