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The Chemistry of CRL 618

Published online by Cambridge University Press:  26 May 2016

Paul M. Woods
Affiliation:
Department of Physics, UMIST, P.O. Box 88, Manchester, M60 1QD, UK
T. J. Millar
Affiliation:
Department of Physics, UMIST, P.O. Box 88, Manchester, M60 1QD, UK
Albert A. Zijlstra
Affiliation:
Department of Physics, UMIST, P.O. Box 88, Manchester, M60 1QD, UK
E. Herbst
Affiliation:
Departments of Physics and Astronomy, The Ohio State University, Columbus, OH 43210, USA

Abstract

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We present a chemical model of the central torus around CRL 618 in order to confirm that long-chained hydrocarbons and benzene are formed at detectable abundances. We reproduce the observed abundances of these molecules comparatively well. We infer from our calculations that CRL 618 must be a young PPN, with a post-AGB age of approximately 600 yr.

Type
Part V: Dust and Molecules in Planetary Nebulae
Copyright
Copyright © Astronomical Society of the Pacific 2003