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Physical Conditions and Abundances in NGC 6543

Published online by Cambridge University Press:  26 May 2016

R. Wesson  and
X.-W. Liu
R. Wesson
Affiliation:
Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT
X.-W. Liu
Affiliation:
Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT

Extract

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We present analysis of the physical conditions and chemical abundances in NGC 6453, the Cat's Eye Nebula. Using archival HST images in conjunction with ground-based long-slit scanning spectra, we have produced an [O III] forbidden line temperature map of the nebula, which shows that the temperature remains constant at around 8000 K across the nebula. From the long-slit spectra, we have determined abundances both from collisionally excited lines (CELs) and optical recombination lines (ORLs). The ORL abundances are higher than the CEL abundances by a factor of approximately two.

Type
Part VI: The Ionized Gas in Planetary Nebulae
Information
Symposium - International Astronomical Union , Volume 209: Planetary Nebulae: Their Evolution and Role in the Universe , 2003 , pp. 379 - 380
Copyright
Copyright © Astronomical Society of the Pacific 2003 

References

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