...3,

In memoriam.

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... curves

Similar spiral light curves and eclipse shapes are obtained if we extend the spiral passband to higher velocity ranges (up to $\vert v\vert = 1300\;\rm km~s^{-1}$, see Harlaftis et al. 2004). However, the resulting light curves have lower signal-to-noise ratios as a consequence of the reduced average flux.

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... arms

For a disc opening angle $\alpha \simeq 2^\circ{-}3^\circ$, the disc half thickness H at a distance $R\simeq 0.4\;R_{L1}$ from its centre will be $H= R \tan\alpha \simeq (0.014{-}0.02)\;R_{L1} \simeq (0.8{-}1.1) \times 10^9\;\rm cm$.

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