GALAH survey: Chemically tagging the thick disk

J. Bland-Hawthorn, S. Sharma, K. Freeman

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    5 Citations (Scopus)

    Abstract

    The GALAH survey targets one million stars in the southern hemisphere down to a limiting magnitude of V = 14 at the Anglo-Australian Telescope. The project aims to measure up to 30 elemental abundances and radial velocities (≈1 kms-1 accuracy) for each star at a resolution of R = 28,000. These elements fall into 8 independent groups (e.g.α, Fe peak, r-process). For all stars, Gaia will provide distances to 1% and transverse velocities to 1 km s-1 or better, giving us a 14D set of parameters for each star, i.e. 6D phase space and 8D abundance space. There are many scientific applications but here we focus on the prospect of chemically tagging the thick disk and making a direct measurement of how stellar migration evolves with cosmic time.

    Original languageEnglish
    Pages (from-to)219-226
    Number of pages8
    JournalEAS Publications Series
    Volume67-68
    Issue numberJanuary
    DOIs
    Publication statusPublished - 2014

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