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I will present results from the GALAH survey on chemically tagging stars from stellar streams and co-moving pairs of stars. The essence of chemical tagging is the theory that all stars form in clusters, and all clusters form from chemically homogenous molecular clouds - therefore, all the stars from a given cluster should share the same elemental abundances. But these birth clusters are quickly disrupted by the Milky Way, distributing their stars throughout the Galaxy. The principal aim of the GALAH survey is to use chemical tagging to associate seemingly unrelated field stars back to their common birth clusters through their elemental abundance patterns, kinematics, and (sometimes) ages. This allows us to reconstruct the formation history of the Milky Way. In this talk I will present results from investigating chemical tagging at intermediary stages of cluster dissolution, where the kinematics of the stars allow us to know the stars are very likely to have had a common origin. |
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