Fig. 1.

Mass loss rates normalized to stellar surface area as a function of age for stars in Table 6. The adopted mass loss rate of the Sun is 2 × 10⁻¹⁴M
yr⁻¹. The shaded area denotes the evolution derived from Eq. (3) and F_X ∝ t^−1.74±034 (Ayres, 1997) by Wood etal. (2005). The different symbols (circle, triangle, square, diamond) represent different age determination methods (t_gyro, t_chromo, t_iso,t_other; cf. Table 6).