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The halo+cluster system of the Galactic globular cluster NGC 1851

Marino, Anna; Milone, Antonino; Yong, David; Dotter, Aaron; Da Costa, Gary; Asplund, Martin; Jerjen, Helmut; Mackey, Alasdair; Norris, John; Cassisi, S; Sbordone, L; Stetson, Peter B; Weiss, A; Aparicio, Antonio; Bedin, L R; Lind, K.; Monelli, M; Piotto, G; Angeloni, R; Buonanno, R


NGC 1851 is surrounded by a stellar component that extends more than 10 times beyond the tidal radius. Although the nature of this stellar structure is not known, it has been suggested to be a sparse halo of stars or associated with a stellar stream. We analyse the nature of this intriguing stellar component surrounding NGC 1851 by investigating its radial velocities and chemical composition, in particular in comparison with those of the central cluster analysed in a homogeneous manner. In...[Show more]

CollectionsANU Research Publications
Date published: 2014
Type: Journal article
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1093/mnras/stu1099
Access Rights: Open Access


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