Lithium problem in Big Bang nucleosynthesis?

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SUMMARY

The discussion centers on the discrepancy between the predicted primordial abundance of lithium from Big Bang nucleosynthesis and the observed values. Theoretical predictions based on WMAP data suggest consistency, yet actual measurements indicate a significant shortfall in lithium abundance. This contradiction remains unresolved, with participants questioning their interpretation of the data and seeking clarity on the underlying reasons for the observed lithium problem.

PREREQUISITES
  • Understanding of Big Bang nucleosynthesis
  • Familiarity with WMAP (Wilkinson Microwave Anisotropy Probe) data
  • Knowledge of elemental abundance measurements in astrophysics
  • Basic comprehension of cosmological models
NEXT STEPS
  • Research the implications of the lithium problem on cosmological models
  • Examine recent studies on primordial nucleosynthesis
  • Explore alternative theories addressing the lithium discrepancy
  • Analyze data from the latest astrophysical surveys on elemental abundances
USEFUL FOR

Astronomers, cosmologists, and astrophysicists interested in the nuances of Big Bang nucleosynthesis and the implications of elemental abundance discrepancies.

Aidyan
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I frequently read of the problem that the measured primordial abundance of lithium does not match the amount expected by Big Bang nucleosynthesis theory. However, I see also graphs like these which seem to suggest that everything is as expected. Is this a contradiction or am I misreading the data or what? Cant reconcile and compute...

https://wmap.gsfc.nasa.gov/universe/bb_tests_ele.html
1574702867059.png
 
Space news on Phys.org
That graph only shows the theoretical prediction of the elemental abundances which would be consistent with WMAP data. But yes, observed lithium abundances are way off and we don't know why.
 

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