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Point Symmetry in Planetary Nebulae

Published online by Cambridge University Press:  07 August 2017

Romano L.M. Corradi ,
Hugo E. Schwarz  and
Letizia Stanghellini
Romano L.M. Corradi
Affiliation:
ESO, Casilla 19001, Santiago 19, Chile
Hugo E. Schwarz
Affiliation:
ESO, Casilla 19001, Santiago 19, Chile
Letizia Stanghellini
Affiliation:
Osservatorio Astronomico di Bologna, via Zamboni 15, Bologna, Italia

Extract

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We present narrow band images and spectra illustrating the morphological and kinematical characteristics of a new class of planetary nebulae. It consists of all those objects in the catalogue by Schwarz et al. (1992) whose morphology shows no other symmetries than point–reflection about the central source. This peculiar shape is often determined by pairs of ansae or blobs separated from the central body of the nebula. The kinematical data show both low (e.g. IC 4634) and high (He 2–186; Vexp > 135 km s−1) velocity outflows.

Type
III. Highlights on the Nebulae
Information
Symposium - International Astronomical Union , Volume 155: Planetary Nebulae , 1993 , pp. 216
Copyright
Copyright © Kluwer 1993 

References

Schwarz, H.E., Corradi, R.L.M., and Melnick, J. 1992 AASS, in the press Google Scholar