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We report the results of an [O III] 5007 spectroscopic survey for planetarynebulae (PNe) located within the star clusters of M31. By examining R ~ 5000spectra taken with the WIYN+Hydra spectrograph, we identify 3 PN candidates ina sample of 274 likely globular clusters, 2 candidates in objects which may beglobular clusters, and 5 candidates in a set of 85 younger systems. Thepossible PNe are all faint, between ~2.5 and ~6.8 mag down the PN luminosityfunction, and, partly as a consequence of our selection criteria, have highexcitation, with [O III] 5007 to H-beta ratios ranging from 2 to ~12. Wediscuss the individual candidates, their likelihood of cluster membership, andthe possibility that they were formed via binary interactions within theclusters. Our data are consistent with the suggestion that PN formation withinglobular clusters correlates with binary encounter frequency, though, due tothe small numbers and large uncertainties in the candidate list, this studydoes not provide sufficient evidence to confirm the hypothesis.

A Survey for Planetary Nebulae in M31 Globular Clusters