Fig. 5

Doppler speeds of the fitted blue and red Gaussian components attributed to the circumbinary disk are shown in the left panel for He I data and in the right for the model described in the text. Julian date increases vertically and in both panels the bluer component is denoted by + and the redder by × . The model reproduces the gross features of the data rather well, in particular the snaking from blue to red and back.
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