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

Published online by Cambridge University Press:  30 December 2019

Anke Arentsen ,
Else Starkenburg ,
Matthew D. Shetrone ,
Alan W. McConnachie ,
Kim A. Venn  and
Éric Depagne
Anke Arentsen
Affiliation:
Leibniz-Institut für Astrophysik Potsdam (AIP), Potsdam, Germany email: [email protected]
Else Starkenburg
Affiliation:
Leibniz-Institut für Astrophysik Potsdam (AIP), Potsdam, Germany email: [email protected]
Matthew D. Shetrone
Affiliation:
McDonald Observatory, The University of Texas at Austin, Austin, USA
Alan W. McConnachie
Affiliation:
NRC Herzberg Institute of Astrophysics, Victoria, Canada
Kim A. Venn
Affiliation:
Department of Physics and Astronomy, University of Victoria, Victoria, Canada
Éric Depagne
Affiliation:
Southern African Large Telescope/SAAO, Cape Town, South Africa
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Abstract

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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.

Keywords

stars: chemically peculiarbinaries: spectroscopicstars: AGB and post-AGBGalaxy: halogalaxies: formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S343: Why Galaxies Care About AGB Stars: A Continuing Challenge through Cosmic Time , August 2018 , pp. 265 - 267
Copyright
© International Astronomical Union 2019 

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