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Discovery of a faint outer halo Milky Way star cluster in the southern sky

Kim, Dongwon; Jerjen, Helmut; Milone, Antonino P; Mackey, Dougal; Costa, Gary S. Da

Description

We report the discovery of a new, low-luminosity star cluster in the outer halo of the Milky Way. High-quality gr photometry is presented, from which a color–magnitude diagram is constructed, and estimates of age, [Fe/H], [α/Fe], and distance are derived. The star cluster, which we designate as Kim 2, lies at a heliocentric distance of ∼105 kpc. With a half-light radius of ∼12.8 pc and ellipticity of ϵ ∼ 0.12, it shares the properties of outer halo globular clusters, except for at higher...[Show more]

CollectionsANU Research Publications
Date published: 2015-04-20
Type: Journal article
URI: http://hdl.handle.net/1885/15275
Source: The Astrophysical Journal
DOI: 10.1088/0004-637X/803/2/63

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