The Astrophysical Journal· 2026Q1
The LBT Y p Project. IV. A New Value of the Primordial Helium Abundance
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- Q1SCImago
- 2026year
Short summary
A new determination of the primordial helium abundance (y_p) using Large Binocular Telescope observations of 41 metal-poor H II regions yields y_p = 0.08146 ± 0.00058, achieving an unprecedented 0.5% precision.
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Astronomy and AstrophysicsPhysics and Astronomy