Symmetric vs. asymmetric planetary nebulae: morphology and chemical abundances

Details Symmetric vs. asymmetric planetary nebulae: morphology and chemical abundances Symmetric vs. asymmetric planetary nebulae: morphology and chemical abundances

2010-09-28

arxiv.org/abs/1009.5634v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

4 pages, 1 figure, to appear in the proceedings of Asymmetrical Planetary Nebulae V, ed. A. Zijlstra et al., Ebrary online pub

Scientific paper

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 different PN types. Special emphasis is given to the differences 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.

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