Comparison of the Masses of planetary nebula nuclei derived from different methods.
Gorny S.K., Tylenda R., Stasinska G.
1993, Acta Astr. 43, 371

Abstract:
We present some results of an extensive and uniform analysis of planetary nebula nuclei from samples examined by Mendez et al. and Gathier & Pottasch. The present study uses distance independent diagrams. The theoretical tracks have been modified so that they can be directly compared in the diagrams to the observed central star positions. From this comparison the central star masses have been derived. Our results are in contradiction with those from the above cited studies. Possible explanations of the differences are presented.

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