Fig. 23.
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Comparison of the observations of SN 1993J at 209 d with the He-star explosion model he7p0 at 200 d with a uniform volume filling factor of 50%. Model and observation are normalized at 6900 Å. No Hα contribution is included in the model, so that the red shoulder of the [O I] λλ 6300, 6364 doublet is primarily due to [N II] λλ 6548, 6583.
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