Release 11.12 ("Hergest Ridge")


Gclusters :: Bibliographic item "gc514"

Article ID: gc514
AuthorMarino, A.F. et al.
TitleChemical abundances in the multiple sub-giant branch of 47 Tucanae: insights on its faint sub-giant branch component
JournalMNRAS, Volume 459, p.610-623
Year of publication2016 (on gclusters from 2016-06-17 14:38:27 )
AbstractThe globular cluster 47 Tuc exhibits a complex sub-giant branch (SGB) with a faint-SGB comprising only about the 10 per cent of the cluster mass and a bright-SGB hosting at least two distinct populations. We present a spectroscopic analysis of 62 SGB stars including 21 faint-SGB stars. We thus provide the first chemical analysis of the intriguing faint-SGB population and compare its abundances with those of the dominant populations.(...) The iron abundance of the bright and faint-SGB is the same to a level of around 0.10 dex, and no other significant difference for the analysed elements has been detected.
TagsNGC 104

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