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Physical Conditions and Abundances in Abell 30

Published online by Cambridge University Press:  26 May 2016

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

Extract

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Abell 30 is one of a small number of PN known as born-again PN, which appear to be old nebulae whose central star has undergone a further ejection of highly processed material. It consists of a large, faint, spherical shell, in which several bright knots are embedded. The knots were first noted by Jacoby (1979), and analysis of their abundances by Hazard et al (1980) and Jacoby & Ford (1983) showed that they are extremely hydrogen-deficient.

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. 381 - 382
Copyright
Copyright © Astronomical Society of the Pacific 2003 

References

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