Correlation Between U/Th and Pb/Os Abundance Ratios and its Application in Nuclear Cosmochronology

The abundance ratios of radioactive elements U/Th and stable elements Pb/Os from the r -process are found to have a strong correlation. This correlation is quite robust with respect to astrophysical conditions. The U/Th–Pb/Os correlation is applied to provide customized initial abundance ratios U/Th...

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Published inThe Astrophysical journal Vol. 988; no. 1; pp. 22 - 28
Main Authors Huang, Y. Y., Cui, Q. Q., Wu, X. H., Zhang, S. Q.
Format Journal Article
LanguageEnglish
Published Philadelphia The American Astronomical Society 20.07.2025
IOP Publishing
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ISSN0004-637X
1538-4357
1538-4357
DOI10.3847/1538-4357/ade390

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Abstract The abundance ratios of radioactive elements U/Th and stable elements Pb/Os from the r -process are found to have a strong correlation. This correlation is quite robust with respect to astrophysical conditions. The U/Th–Pb/Os correlation is applied to provide customized initial abundance ratios U/Th from the observed abundance ratios Pb/Os for six r -process enhanced metal-poor stars. The ages of these six metal-poor stars are predicted by the U/Th chronometer, which are approximately between 11 and 15 Gyr. Their ages are compatible with the cosmic age of 13.8 billion years predicted from the cosmic microwave background radiation.
AbstractList The abundance ratios of radioactive elements U/Th and stable elements Pb/Os from the r -process are found to have a strong correlation. This correlation is quite robust with respect to astrophysical conditions. The U/Th–Pb/Os correlation is applied to provide customized initial abundance ratios U/Th from the observed abundance ratios Pb/Os for six r -process enhanced metal-poor stars. The ages of these six metal-poor stars are predicted by the U/Th chronometer, which are approximately between 11 and 15 Gyr. Their ages are compatible with the cosmic age of 13.8 billion years predicted from the cosmic microwave background radiation.
Author Wu, X. H.
Huang, Y. Y.
Cui, Q. Q.
Zhang, S. Q.
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Snippet The abundance ratios of radioactive elements U/Th and stable elements Pb/Os from the r -process are found to have a strong correlation. This correlation is...
The abundance ratios of radioactive elements U/Th and stable elements Pb/Os from the r-process are found to have a strong correlation. This correlation is...
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SubjectTerms Abundance
Background radiation
Correlation
Cosmic microwave background
Measuring instruments
Metallicity
Nuclear abundances
Nuclear astrophysics
R-process
Radioisotopes
Stellar ages
Thorium
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Title Correlation Between U/Th and Pb/Os Abundance Ratios and its Application in Nuclear Cosmochronology
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