Fig. 5
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Comparison between effective temperatures and spectral types. The red diamond symbols represent our spectroscopic determinations, whereas the hexagons are literature values from Evans et al. (2004a), Trundle et al. (2004), and Trundle & Lennon (2005). The plotted curves are the calibrations from Schootemeijer et al. (2021) for the SMC stars (solid blue curve), Searle et al. (2008, dotted green curve), and de Burgos et al. (2023, dashed dark green curve) for Galactic BSGs.
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