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GRACES observations of young [α/Fe]-rich stars

Yong, David; Casagrande, Luca; Venn, Kim A.; Chene, Andre-Nicolas; Keown, Jared; Malo, Lison; Martioli, Eder; Alves-Brito, Alan; Asplund, Martin; Dotter, Aaron; Martell, Sarah L.; Melendez, Jorge; Schlesinger, Katharine J.

Description

We measure chemical abundance ratios and radial velocities in four massive (i.e. young) [α/Fe]-rich red giant stars using high-resolution high-S/N spectra from ESPaDOnS fed by Gemini-GRACES. Our differential analysis ensures that our chemical abundances are on the same scale as the Alves-Brito et al. (2010) study of bulge, thin, and thick disc red giants. We confirm that the program stars have enhanced [α/Fe] ratios and are slightly metal poor. Aside from lithium enrichment in one object, the...[Show more]

CollectionsANU Research Publications
Date published: 2016-03-23
Type: Journal article
URI: http://hdl.handle.net/1885/111559
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1093/mnras/stw676

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