Analysis of chemical abundances in planetary nebulae with [WC] central stars - I. Line intensities and physical conditions

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Fig. 14

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Photoionization models computed to reproduce the observed T_e([O iii])/T_e([N ii]) vs. O⁺⁺/O⁺ behaviour. Models (circles) and observational data (squares) are colored according to the O/H value. At the lower left, we show the typical error bars for the observational data.

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