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Anomalous Abundances in Red Giant Stars Suchitra C. Balachandran Abstract Red giants with their deep convective envelopes reveal nucleosynthesis undergone in the stellar interior. Observations show that some abundances do not conform to standard models. Sometimes these anomalous abundances simply require the postulation of "extra-mixing", which, though not incorporated by the models can conceivably be present and important. But, at other times, the observed abundances defy explanation, for example the production of large quantities of fragile lithium in a hostile environment. In all cases, these anomalous abundances give us the opportunity to probe and decipher the physics of the stellar interior. This talk will provide an update on recent observational results. |