| Issue |
EPJ Web Conf.
Volume 297, 2024
International Symposium on Nuclear Astrophysics (ISNA23)
|
|
|---|---|---|
| Article Number | 01007 | |
| Number of page(s) | 5 | |
| Section | Lectures | |
| DOI | https://doi.org/10.1051/epjconf/202429701007 | |
| Published online | 07 June 2024 | |
https://doi.org/10.1051/epjconf/202429701007
The ups and downs of inferred cosmological lithium
Division of astronomy and space physics, Department of physics and astronomy, Uppsala University, Uppsala, Sweden
* e-mail: andreas.korn@physics.uu.se
Published online: 7 June 2024
I summarize the stellar side of the cosmological lithium problem(s). Evidence from independent studies is accumulating and indicates that stars may very well be fully responsible for lowering their surface lithium from the predicted primordial value to observed levels through internal element-transport mechanisms collectively referred to as atomic diffusion.
While atomic diffusion can be modelled from first principles, stellar evolution uses a parametrized representation of convection making it impossible to predict convective-boundary mixing as a vital stellar process moderating atomic diffusion. More work is clearly needed here for a fully quantitative picture of lithium (and metallicity) evolution as stars age.
Lastly, note that inferred stellar lithium-6 abundances have all but disappeared.
© The Authors, published by EDP Sciences, 2024
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