W. J. Maciel -
Abstract #129
SYMMETRIC VS. ASYMMETRIC PLANETARY NEBULAE: MORPHOLOGY AND CHEMICAL ABUNDANCES
W. J. Maciel, R. D. D. Costa
Asymmetric planetary nebulae V, Ed. A. A. Zijlstra, F. Lykou, I. McDonald, E. Lagadec, Electronic publication, Ebrary, 54-57 (2011) We analyse a large sample of galactic planetary nebulae based on their chemical composition and morphology. A recent morphological classification system is adopted, and several elements are considered, namely He, N, O, S, Ar, Ne, and C in order to investigate the correlations involving these elements and the di erent PN types. Special emphasis is given to the di erences between symmetric (round or elliptical) nebulae and those that present some degree of asymmetry (bipolars or bipolar core objects). The results are compared with previous findings both for PN in the Galaxy and in the Magellanic Clouds.
