Fig. 7.
The spectroscopic HR diagram for the sample stars: red circles represent the outer disk stars and the blue triangles represent the Local disk stars. Evolutionary tracks computed for masses 7, 9, 12, 15, and 20 M⊙ (solid lines, from yellow to orange, respectively) and for the Zero Age Main Sequence (ZAMS, dashed line) are also shown (Ekström et al. 2012).
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