Document detail
ID
oai:arXiv.org:2406.09974
Topic
Astrophysics - Solar and Stellar A... Astrophysics - Cosmology and Nonga... Astrophysics - Astrophysics of Gal...Author
Korn, A. J.Category
sciences: astrophysics
Year
2024
listing date
6/19/2024
Keywords
atomic diffusion astrophysics stellarAbstract
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.
;Comment: 5 pages, in: Proceedings of the International Symposium on Nuclear Astrophysics (ISNA 2023) held at Manipal, India (Oct 30 - Nov 2, 2023)
Korn, A. J., 2024, The ups and downs of inferred cosmological lithium
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