Speaker
Description
Nucleosynthetic yields from stars are key inputs for galactic chemical evolution models and are essential for understanding the origin and distribution of elements in galaxies. While most chemical evolution studies adopt single-star yields for massive stars, observations indicate that the majority of massive stars form and evolve in binary systems. Incorporating the effects of binary evolution into chemical evolution models remains challenging due to the complexity of binary interactions and the computational cost of population synthesis. In this work, we compute effective binary star yields, which provide a practical framework for including binary contributions in chemical evolution models with an approach analogous to single-star yields. These effective yields encapsulate the impact of binary interactions, such as mass transfer and binary birth distributions, on stellar nucleosynthesis without requiring explicit binary population synthesis. We incorporate these yields into chemical evolution models to study their effects on both stable elements and short-lived radionuclides, including 26Al, and 60Fe. By comparing chemical evolution models using standard single-star yields, primary yields, and effective binary yields, we quantify their effects on stable and radio nuclides abundances and explore their implications for galactic chemical enrichment and early solar system formation. In this presentation, we will share the insights into the role of binary evolution in shaping observed abundance distributions.
| Category | Theory |
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