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The Extragalactic Origin of the Arcturus Group

Navarro, J F; Helmi, Amina; Freeman, Kenneth


We reanalyze the group of stars associated kinematically with Arcturus and confirm that they constitute a peculiar grouping of metal-poor stars with similar apocentric radius, common angular momentum, and distinct metal abundance patterns. These properties are consistent with those expected for a group of stars originating from the debris of a disrupted satellite. The Arcturus group stands out clearly in the catalog of Beers et al. and in other compilations of metal-poor stars in the solar...[Show more]

CollectionsANU Research Publications
Date published: 2004
Type: Journal article
Source: Astrophysical Journal, The


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