Lithium-6 : evolution from big bang to present
@article{VangioniFlam1999Lithium6E, title={Lithium-6 : evolution from big bang to present}, author={Elisabeth Vangioni-Flam and Michel Cass{\'e} and Roger. Cayrel and Jean Audouze and Monique Spite and F. Spite}, journal={New Astronomy}, year={1999}, volume={4}, pages={245-254} }
67 Citations
The lithium content of the Galactic Halo stars
- Physics
- 2005
Thanks to the accurate determination of the baryon density of the universe by the recent cosmic microwave background experiments, updated predictions of the standard model of Big Bang nucleosynthesis…
Galactic fly-bys: New source of lithium production
- Physics
- 2013
Observations of low-metallicity halo stars have revealed a puzzling result: the abundance of \li7 in these stars is at least three times lower than their predicted primordial abundance. It is unclear…
The effects of unstable particles on light-element abundances: Lithium versus deuterium and 3He
- Physics
- 2005
Production of Lithium in the Galactic Disk
- Physics
- 2000
The abundance of Li in stars formed within the past 5 Gyr is log N(Li) = 3.2(± 0.2), while the corresponding value for the oldest stars in the Galaxy is log N(Li) = 2.2(± 0.2). The global evidence…
Implications of a new temperature scale for halo dwarfs on LiBeB and chemical evolution
- Physics
- 2005
Big bang nucleosynthesis (BBN) and the cosmic baryon density from cosmic microwave background anisotropies together predict a primordial 7Li abundance a factor of 2-3 higher than that observed in…
COSMOLOGICAL COSMIC RAYS AND THE OBSERVED ^6Li PLATEAU IN METAL-POOR HALO STARS
- Physics
- 2005
Very recent observations of the 6Li isotope in halo stars reveal a 6Li plateau about 1000 times above the predicted big bang nucleosynthesis abundance. We calculate the evolution of 6Li versus…
The Revival of Galactic Cosmic-Ray Nucleosynthesis?
- Physics
- 1998
Because of the roughly linear correlation between Be/H and Fe/H in low-metallicity halo stars, it has been argued that a primary component in the nucleosynthesis of Be must be present in addition to…
From First Stars to the Spite Plateau: A Possible Reconciliation of Halo Stars Observations with Predictions from Big Bang Nucleosynthesis
- Physics
- 2006
Since the pioneering observations of Spite & Spite in 1982, the constant lithium abundance of metal-poor ([Fe/H] < -1.3) halo stars near the turnoff has been attributed to a cosmological origin.…
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Lithium abundances in a selected sample of halo stars have been revised by using the new accurate IRFM effective temperatures by Alonso, Arribas & Mart´onez-Roger (1996a). From 41 plateau stars (Teff…
Lithium abundance at the formation of the Galaxy
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The observed abundance of lithium in population I stars (young stars)1 seems to have been stable during the past 5 × 109 yr (ref. 2). This stability has been used previously1,3 to estimate the…
Element Segregation in Low-Metallicity Stars and the Primordial Lithium Abundance
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Observational constraints on the primordial lithium abundance are important for the evaluation of the baryonic density of the universe. Its precise determination, however, suffers from uncertainties…
The Revival of Galactic Cosmic-Ray Nucleosynthesis?
- Physics
- 1998
Because of the roughly linear correlation between Be/H and Fe/H in low-metallicity halo stars, it has been argued that a primary component in the nucleosynthesis of Be must be present in addition to…
On the Significance of Population II6Li Abundances
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We study the significance of 6Li abundances measured in metal-poor halo stars. We explore possible depletion factors for 6Li, defined as the ratio of the protostellar to the observed abundance, in…
Galactic evolution of beryllium
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The abundance of Be in the lowest-metallicity stars is a probe of Big Bang Nucleosynthesis, and its abundance in halo and disk stars is a probe of galactic evolution and stellar structure. We present…
Abundances of the elements in the halo stars, interaction between observation and theory
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The halo stars are very old stars formed at the beginning of the evolution of the Galaxy. Their main characteristic is that their atmosphere is very metal-poor since at the time of their birth, the…
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The recently attained ability to make measurements of Be and B as well as to put constraints on Li-6 abundances in metal-poor stars has led to a detailed reexamination of big bang nucleosynthesis in…
ABUNDANCE RATIOS AND GALACTIC CHEMICAL EVOLUTION
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▪ Abstract The metallicity of stars in the Galaxy ranges from [Fe/H] = −4 to +0.5 dex, and the solar iron abundance is e(Fe) = 7.51 ± 0.01 dex. The average values of [Fe/H] in the solar neighborhood,…