A search for CO+ in planetary nebulae

Details A search for CO+ in planetary nebulae A search for CO+ in planetary nebulae

2007-09-06

arxiv.org/abs/0709.0947v1

Mon.Not.Roy.Astron.Soc.382:1139-1144,2007

Astronomy and Astrophysics

Astrophysics

6 pages, 4 figures, accepted for publication in MNRAS

Scientific paper

10.1111/j.1365-2966.2007.12398.x

We have carried out a systematic search for the molecular ion CO+ in a sample of 8 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 to 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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