Fig. A.1.

Time-evolution models by Matt et al. (2015) for three different initial rotation periods. In particular, Prot1 = 1.54 d, Prot2 = 5.51 d and Prot3 = 8.83 d. The retrieved Lx–Age relation from time evolution models together with literature data by Stelzer & Neuhäuser (2001), Wright et al. (2011), and Veyette & Muirhead (2018). The three mass ranges are shown from top to bottom: M⋆ > 0.6 M⊙, 0.4 M⊙ ≤ M⋆ ≤ 0.6 M⊙, and M⋆ < 0.4 M⊙.
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