The Morphological and Structural Classification of Planetary Nebulae

Manchado, A.; Villaver, Eva; Stanghellini, Letizia; Guerrero, Martín A.
Bibliographical reference

Asymmetrical Planetary Nebulae II: From Origins to Microstructures, ASP Conference Series, Vol. 199. Edited by J. H. Kastner, N. Soker, and S. Rappaport. ISBN: 1-58381-026-9, 2000, p. 17

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0
2000
Number of authors
4
IAC number of authors
1
Citations
63
Refereed citations
49
Description
We present a statistical analysis of a complete sample (255) of northern planetary nebulae (PNe). Our analysis is based on morphology as a main parameter. The major morphological classes are: round (26&#37 of the sample), elliptical (61&#37), and bipolar (13&#37) PNe. About a half of the round and 30 &#37 of the elliptical PNe present multiple shells. Round PNe have higher galactic latitude (|b| = 12) and galactic height (< z > = 753 pc), than the elliptical PNe (|b| = 7, < z > = 308 pc) and bipolar PNe (|b| = 3, < z > = 179 pc). This possibly implies a different progenitor mass range across morphology, as a different stellar population would suggest.