Fig. A.13.
Four FLAMES observations of BAT99 95 at phases ϕ = 0.18, 0.57, 0.65, 0.88. The motion of the primary, hotter WR star can be seen in the N IVλ4060 line, following the motion in other He II lines. He I lines such as He Iλ4471 do not follow this motion and even depict a slight anti-phase behavior (see trough of black and red emission wing in the right panel).
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