Fig. 2
The p-factor plotted versus log period for the seven stars that have an error in p smaller than 0.4. The open squares indicate the two stars for which the radius was fixed from the PR relation. Also plotted is a line indicating the best constant value of p = 1.264, while the dashed lines represent the p-factor relation proposed by Storm et al. (2011a), p = 1.550 − 0.186log P.
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