Fig. 8
Hertzsprung-Russell diagram of the M 31 late WN sample. The colored symbols refer to the M 31 stars with the colors indicating different hydrogen content as labeled in the previous figures. The filled gray symbols show the positions of the late-type WNh stars from Milky Way using the results from Hamann et al. (2006), Martins et al. (2008), and Liermann et al. (2010). The open gray symbols refer to the LMC late-type WNh stars from Hainich et al. (2014).
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