O ct 2 00 7 In Search of Possible Associations between Planetary Nebulae and Open Clusters

Abstract

We consider the possibility of cluster membership for 13 planetary nebulae that are located in close proximity to open clusters lying in their lines of sight. The short lifetimes and low sample size of intermediate-mass planetary nebulae with respect to nearby open clusters conspire to reduce the probability of observing a true association. Not surprisingly… (More)

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