Chemistry and binarity in the early Universe: what is the role of metal-poor AGB stars?
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.
- Publication:
-
Why Galaxies Care About AGB Stars: A Continuing Challenge through Cosmic Time
- Pub Date:
- December 2019
- DOI:
- Bibcode:
- 2019IAUS..343..265A
- Keywords:
-
- stars: chemically peculiar;
- binaries: spectroscopic;
- stars: AGB and post-AGB;
- Galaxy: halo;
- galaxies: formation