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The primordial lithium abundance
Open accessAbstract
Lithium abundances in a selected sample of halo stars have been revised by using the new accurate infrared flux method (IRFM) effective temperatures by Alonso, Arribas & Martíinez-Roger. From 41 plateau stars (Teff>5700 and [Fe/H] ≤ −1.5) we found no evidence for intrinsic dispersion, a tiny trend with Teff and no trend with [Fe/H]. The trend with the Teff is fully consistent with the standard Li isochrones of Deliyannis, Demarque & Kawaler, implying a primordial value for Li of A(Li) = 2.238 ± 0.0121σ ± 0.05sys. The present results argue against any kind of depletion predicted by diffusion, rotational mixing or stellar winds. Therefore the Li observed in Population II stars provides a direct and reliable estimate of the baryonic density which can rival other baryonic indicators such as the deuterium in high-redshift systems. The present upwards revision of primordial Li in the framework of standard big bang nucleosynthesis (SBBN) gives, at 1σ, two solutions for the baryonic density: ΩBh2=0.0062+0.0018−0.0011 or ΩBh2 = 0.0146+0.0029−0.0033.
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Cited by
Predictions for Self-Pollution in Globular Cluster Stars
Ventura, P., D’Antona, F., Mazzitelli, I., & Gratton, R. (2001) · The Astrophysical Journal · doi:10.1086/319496 · Cited by 448
Big-bang nucleosynthesis enters the precision era
Schramm, D. N., & Turner, M. S. (1998) · Reviews of Modern Physics · doi:10.1103/revmodphys.70.303 · Cited by 353
Hansen, S. H., Mangano, G., Melchiorri, A., Miele, G., & Pisanti, O. (2001) · Physical Review D · doi:10.1103/physrevd.65.023511 · Cited by 124
Kneller, J. P., & Steigman, G. (2004) · New Journal of Physics · doi:10.1088/1367-2630/6/1/117 · Cited by 95
Metadata
- Authors
- Bonifacio, P., & Molaro, P.
- Venue
- Monthly Notices of the Royal Astronomical Society
- Publisher
- Oxford University Press (OUP)
- Published
- 1997-03-11
- Volume
- 285
- Issue
- 4
- Pages
- 847-861
- ISSN
- 0035-8711 (ISSN-L)
- 1365-2966
- OpenAlex
- W2003678605
- Cited by
- 263
- References
- 0
- FWCI
- 28.95
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Bonifacio, P., & Molaro, P. (1997). The primordial lithium abundance. Monthly Notices of the Royal Astronomical Society. https://doi.org/10.1093/mnras/285.4.847
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