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Long-Slit 2-Dimensional Spectra of the Giant Halos Around NGC 6543 and NGC 6826

Published online by Cambridge University Press:  19 July 2016

D. Middlemass ,
R.E.S. Clegg  and
J. R. Walsh
D. Middlemass
Affiliation:
University College London, U.K.
R.E.S. Clegg
Affiliation:
University College London, U.K.
J. R. Walsh
Affiliation:
Anglo-Australian Observatory, Epping, Australia

Extract

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We have observed the large, faint halos around NGC 6543 and NGC 6826 with the Isaac Newton Telescope, using IPCS and CCD (2-dimensional) detectors. Line intensities are measured every 1.5 arcsec over a total slit length of 3 arcmin (IPCS) or 2 arcmin (CCD). Several slit positions across the halos were observed, so as to obtain average properties of these two regions. Halo spectra are compared with spectra of the bright core, so as to distinguish between reflection by dust and genuine thermal emission; the halos are not reflection nebulae.

Type
II. Nebular Properties
Information
Symposium - International Astronomical Union , Volume 131: Planetary Nebulae , 1989 , pp. 195
Copyright
Copyright © Kluwer 1989