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Fig. E.31
The spectrum of VFTS 509 (WN5(h) + early O) shows the characteristic of a SB2. The temperature is based on the lines N iii λ4634/4640, and N iv λ4058. Ṁ and He-abundance are based on He ii λ4686 and Hα. The fit quality is poor as result of the secondary.
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