Chemistry and binarity in the early Universe: what is the role of metal-poor AGB stars?

Anke Arentsen,Else Starkenburg,Matthew Shetrone,Alan W. McConnachie,Kim A. Venn,Éric Depagne

Proceedings of the International Astronomical Union（2018）

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Abstract

Carbon-enhanced metal-poor stars are probes of the early universe, that teach us about metal-poor AGB stars and supernovae physics in the very first stars. We find a large fraction of CEMP-no stars with large absolute carbon abundance to be in binary systems. This may be an indication of binary interaction with ultra or extremely metal-poor AGB stars, curiously without enhancement in s-process elements.

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Key words

early universe,binarity,metal-poor

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