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Surveying for Ancient Supernovae Across the Galaxy: Mapping SDSS-IV/OCCAM Abundances and the Search for Heavier Elements
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AAS
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2024
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Open clusters are powerful tools for tracing the dynamic and chemical evolution of the Milky Way because of the reliable ages and chemistry that can be derived for them. However, to effectively leverage the open cluster sample to constrain the evolutionary characteristics of the Milky Way, we need to build a large, comprehensive, dataset that samples a large swath of the Galaxy. This is the goal of the SDSS/APOGEE-based Open Cluster Chemical Abundance and Mapping (OCCAM) survey: to identify and analyze a large sample of open clusters with 15+ elemental abundances, currently derived from Gaia and SDSS/APOGEE data. Here we present the results from the OCCAM analysis of DR17, the final data release of SDSS-IV. This dataset of 153 open clusters and 2061 stellar members is used to investigate the Milky Way’s radial metallicity and abundance gradients for different alpha, iron-peak, and odd-z elements. In addition to this dataset, we also present the current status of optical follow-up observations and analyses, of these same stars, that are intended to add 3+ r- and s-process neutron capture abundances each.
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Myers.pdf
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Physics and Astronomy