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| Paper: |
Formation and Evolution of Carbon-Enhanced Metal-Poor Stars |
| Volume: |
445, Why Galaxies Care about AGB Stars II: Shining Examples and Common Inhabitants |
| Page: |
445 |
| Authors: |
Abate, C.; Pols, O. R.; Izzard, R. G. |
| Abstract: |
Very metal-poor stars observed in the Galactic halo constitute a window
on the primordial conditions under which the Milky Way was formed.
A large fraction of these stars show a great enhancement in the
abundance of carbon and other heavy elements. One explanation of this
observation is that these stars have undergone mass transfer
from an AGB binary companion. This scenario is supported by the
evidence that these carbon-enhanced metal-poor (CEMP) stars are mostly
found in spectroscopic binary systems.
We have started a project with the aim to understand several aspects
which still need to be clarified: (1) how the abundances of low-mass
metal-poor stars evolve after accretion of material from an evolved
asymptotic giant branch star, (2) what the consequences of this mass
transfer are for the overall population of CEMP stars, and (3) what
its implications are for the initial mass function at early epochs. |
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