Chemical tagging via Gaussian Mixture Model on multiple abundances shows that halo substructures Sequoia, Heracles, Thamnos, and Helmi Stream are contaminated mixtures dominated by GSE and disc stars, with additional contributions from Sagittarius and omega Cen.
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Using 8D chemical clustering on APOGEE DR17 and kinematic matching to e-TidalGCs simulations, the authors report 470 ω Cen-like stars including 6 kinematically consistent with its stream and additional links to streams from five other clusters, supporting a common disrupted progenitor.
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Chemical decoding of kinematic substructures in the Galactic halo
Chemical tagging via Gaussian Mixture Model on multiple abundances shows that halo substructures Sequoia, Heracles, Thamnos, and Helmi Stream are contaminated mixtures dominated by GSE and disc stars, with additional contributions from Sagittarius and omega Cen.
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The Nephele ecosystem: stars, globular clusters, and stellar streams associated with the progenitor galaxy of $\omega$ Centauri
Using 8D chemical clustering on APOGEE DR17 and kinematic matching to e-TidalGCs simulations, the authors report 470 ω Cen-like stars including 6 kinematically consistent with its stream and additional links to streams from five other clusters, supporting a common disrupted progenitor.