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

  • D. Middlemass
  • R. E. S. Clegg
  • J. R. Walsh
Conference paper
Part of the International Astronomical Union / Union Astronomique Internationale book series (IAUS, volume 131)

Abstract

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.

Keywords

Halo Than Planetary Nebula Monthly Notice Astronomical Society Royal Astronomical Society 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© International Astronomical Union 1989

Authors and Affiliations

  • D. Middlemass
    • 1
  • R. E. S. Clegg
    • 1
  • J. R. Walsh
    • 2
  1. 1.University College LondonUK
  2. 2.Anglo-Australian ObservatoryEppingAustralia

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