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Fig. 9
Gaussian widths σ of He I lines vs. those of Hα. The three dotted lines represent loci of constant gas temperature Tgas = 5000,10 000,15 000 from top to bottom. The dashed line represents equality. Symbols as in Fig. 7. Only datapoints with the same RV from Hα and He I within 3 km s-1 are shown.
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