The temperatures of central stars of planetary nebulae (PNe) are compared with evolutionary tracks. During years of photoionization and kinematic modelling we collected a sample of data for 101 planetary nebulae. We derive information on the nebulae using a combination of line ratios, diameters, and high resolution spectra. The models find the density distribution, stellar temperature and the velocity field. The details of the Torun models are given in Gesicki & Zijlstra (2003).
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