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Kim 3: an ultra-faint start cluster in the constellation of Centaurus

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


We report the discovery of an ultra-faint star cluster in the constellation of Centaurus. This new stellar system, Kim 3, features a half-light radius of ${r}_{h}={2.29}_{-0.52}^{+1.28}$ pc and a total luminosity of MV = +0.7 ± 0.3. Approximately 26 stars are identified as candidate member stars down to four magnitudes below the main-sequence turn-off, which makes Kim 3 the least luminous star cluster known to date. The compact physical size and extreme low luminosity place it close to faint...[Show more]

CollectionsANU Research Publications
Date published: 2016
Type: Journal article
Source: The Astrophysical Journal
DOI: 10.3847/0004-637X/820/2/119
Access Rights: Open Access


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