Constraints on the multiplicity of the most massive stars known: R136 a1, a2, a3, and c

Open Access

Fig. 7

FWHMs of the N IV 14058 and He II 14686 lines for components al, a2, аЗ, and с. The values are offset relative to the FWHMs measured in the first available epoch for each star. The offset values are provided in the legend. Only the FWHMs of He II λ4686 for component с are significantly variable (on a 4σ level).

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