The Hot Shocked Halos of the Planetaries NGC6543 NGC6826 and NGC7662

The properties of the NGS 6543, 6826, and 7662 planetary nebulae (PN) are summarized using the results of 2D, long-slit optical spectroscopy. Significant differences were found between the properties of the PN 'cores' and 'halos'. The apparent electron temperature is always higher in the halos, for example, in NGS 6543. The ionized masses in the faint halos are significantly higher. Thus the central star mass in the NGC 6543 system has 0.62 solar masses and the total mass (star + nebula) is 0.71 solar mass. The apparent halo abundances of O, Ne, and N are found to be about a factor two below the values for the inner regions.