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Title:
A search for CO+ in planetary nebulae
Authors:
Bell, T. A.; Whyatt, W.; Viti, S.; Redman, M. P.
Affiliation:
AA(Department of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT; Department of Astronomy, California Institute of Technology, Pasadena, CA 91125, USA), AB(Department of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT), AC(Department of Physics & Astronomy, University College London, Gower Street, London WC1E 6BT), AD(Department of Physics, National University of Ireland Galway, Galway, Ireland)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 382, Issue 3, pp. 1139-1144. (MNRAS Homepage)
Publication Date:
12/2007
Origin:
MNRAS
MNRAS Keywords:
ISM: molecules , planetary nebulae: general
Abstract Copyright:
(c) 2007 The Authors. Journal compilation © 2007 RAS
DOI:
10.1111/j.1365-2966.2007.12398.x
Bibliographic Code:
2007MNRAS.382.1139B

Abstract

We have carried out a systematic search for the molecular ion CO+ in a sample of eight protoplanetary and planetary nebulae in order to determine the origin of the unexpectedly strong HCO+ emission previously detected in these sources. An understanding of the HCO+ chemistry may provide direct clues for the physical and chemical evolution of planetary nebulae. We find that the integrated intensity of the CO+ line may be correlated with that of HCO+, suggesting that the reaction of CO+ with molecular hydrogen may be an important formation route for HCO+ in these planetary nebulae.
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