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Fig. 5
Ratio of observed reduced Doppler widths ΔλD/λ0 of Hγ and Hδ versus the total emission (“line radiance”) of Hγ. The error bars are smaller than the symbols. Dashes give a mean of the three models with Tkin = 4300, 6000 and 8000 K (all Vnth = 5 km s-1) by Gouttebroze et al. (1993).
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