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G. Gonzalez (Univ. of Washington)
Results of spectroscopic analyses of the parent stars of extrasolar planets are summarized. The metallicities of stars with planets are compared to those of field stars and shown to be larger on average. The stars with close-in planets are particularly metal-rich. Two possible explanations of the observed trends are: 1) primordial, 2) self-enrichment via accretion of H-poor material. Observational tests of these two hypotheses are suggested.