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Fig. 3
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ψ values given by Eqs. (4) and (9) for main-sequence stars of spectral types F4 to M4 at an age of ∼4 Gyr (2-3 Gyr for F-type stars). The four spectral types used in this study are marked in blue, green, yellow, and red, respectively. The dashed line shows ψ = 1, where the stellar wind drag equals the PR drag.
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