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The GALAH survey: Co-orbiting stars and chemical tagging

Simpson, Jeffrey D.; Martell, Sarah; Da Costa, Gary; Casey, Andrew; Freeman, Kenneth; Horner, Jonathan; Ting, Yuan-Sen; Nataf, David M.; Lewis, Geraint Francis; Ness, Mellisa K.; Zucker, Daniel; Cottrell, P. L.; Asplund, Martin; Duong, Ly; Lin, Jane; Schlesinger, Katharine; Nordlander, Thomas


We present a study using the second data release of the GALAH survey of stellar parameters and elemental abundances of 15 pairs of stars identified by Oh et al. They identified these pairs as potentially co-moving pairs using proper motions and parallaxes from Gaia DR1. We find that 11 very wide (>1 pc) pairs of stars do in fact have similar Galactic orbits, while a further four claimed co-moving pairs are not truly co-orbiting. Eight of the 11 co-orbiting pairs have reliable stellar parameters...[Show more]

CollectionsANU Research Publications
Date published: 2019-02
Type: Journal article
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1093/mnras/sty3042
Access Rights: Open Access


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