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CCD Imaging of Nearby Aged Planetary Nebulae

Published online by Cambridge University Press:  26 July 2016

J. Papamastorakis ,
K.M. Xilouris  and
E.V. Paleologou
J. Papamastorakis
Affiliation:
University of Crete Physics Department, Heraklion 714 09, Crete, Greece Foundation for Research Technology-Hellas, Heraklion 711 10, Crete, Greece
K.M. Xilouris
Affiliation:
University of Crete Physics Department, Heraklion 714 09, Crete, Greece Foundation for Research Technology-Hellas, Heraklion 711 10, Crete, Greece
E.V. Paleologou
Affiliation:
University of Crete Physics Department, Heraklion 714 09, Crete, Greece Foundation for Research Technology-Hellas, Heraklion 711 10, Crete, Greece

Abstract

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We present results from narrow band CCD images in Hα + [N II] and [O III] of very faint, nearby (less than 0.5 kpc) planetary nebulae (PNe), of large angular extent.

The instrumental set up used (Mount Skinakas Wide Field Camera) is capable of detecting structures of large angular extent as faint as 10−17 ergs sec−1 cm−2 arcsec−2.

New faint structures are revealed mostly at large distances from the suspected central star of the PNe studied. These structures are atypical of the PNe population and hard to reconcile with the interacting stellar wind evolutionary scenario. They are rather reminiscent of the interaction of the former Red Giant Envelope with the ambient Interstellar Medium.

The characteristics of this aged sample are asymmetric emission distribution, displacement of the central star, extremely low expansion velocities, concentrations along the stellar motion, with the [O III] emission amorphous and confined close to the center of the PN while the Hα + [N II] emission is structured and more extended.

Type
Part Nine: Galactic Structure
Information
Symposium - International Astronomical Union , Volume 161: Astronomy from Wide-Field Imaging , 1994 , pp. 484 - 486
Copyright
Copyright © Kluwer 1994 

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