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| Paper: |
Understanding AGB Nucleosynthesis from Chemical Composition
Studies of CH Stars |
| Volume: |
497, Why Galaxies Care about AGB Stars III: A Closer Look in Space and Time |
| Page: |
307 |
| Authors: |
Karinkuzhi, D.; Goswami, A. |
| Abstract: |
CH stars are known to show enhanced abundances of carbon and heavy
s-process elements. They are metal-deficient population II objects.
Their luminosities indicate that they are mostly giants; hence, the
observed enhanced abundances of heavy elements are unlikely to have
been produced inside the stars during stellar nucleosynthesis. As
most of the CH stars are known to be binaries, the observed abundance
anomalies are generally explained on the basis of a binary picture
involving a low-mass companion evolving through the AGB phase.
Detailed chemical analysis of CH stars can thus provide knowledge
about the nucleosynthesis taking place in the companion AGB stars.
We have conducted a detailed chemical composition study for a large
sample of CH stars. Interpretation of the elemental abundances based
on AGB nucleosynthesis models will help to understand the origin of
the heavy elements observed in these objects. |
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