Fig. 8.
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Positions of σ Ori E and analogous stars in the HR diagram. The data for σ Ori E are those indicated in Table 2. For the other stars, the data have been taken as given in Table 1 of Shultz et al. (2020), except for the star CD –57°3509 taken from Przybilla et al. (2016). Main-Sequence rotating tracks from Ekström et al. (2012a) for the 5, 7, 9 and 12 M⊙ are indicated.
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