The path to metallicity: synthesis of CNO elements in standard BBN

Abstract

We perform a reanalysis of the production of CNO elements in a standard Big Bang Nucleosynthesis scenario. The CNO yields in BBN are suppressed by the low density of the plasma, Coulomb barrier effects and the short time scales involved. Yet, the inclusion of nuclides and reactions traditionally disregarded may lead to an increase relevant enough to affect the pristine Population III stars. After a critical reanalysis and upgrade of the nuclear network our results show no major discrepancies with the ones obtained using a smaller nuclear network. The robustness of the standard predictions-the early generation of star developed in a metal-free environment-is confirmed.

arXiv comment4 pages, 1 eps figure

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• Effects of rotation on the evolution of primordial stars
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• A robust upper limit on N_eff from BBN, circa 2011
• Standard big bang nucleosynthesis and primordial CNO Abundances after Planck
• PArthENoPE reloaded
• A new tension in the cosmological model from primordial deuterium?
• Dark Matter capture and annihilation on the First Stars: preliminary estimates
• Dark matter annihilation effects on the first stars
• The variation of fundamental constants and the role of A=5 and A=8 nuclei on primordial nucleosynthesis
• Statistical Methods for Thermonuclear Reaction Rates and Nucleosynthesis Simulations
• High Energy neutrino signals from the Epoch of Reionization
• Constraining the primordial black hole abundance through Big-Bang nucleosynthesis
• Recent results in nuclear astrophysics
• Metal Enrichment in the Reionization Epoch
• Constraints on Lepton Asymmetry from Nucleosynthesis in a Linearly Coasting Cosmology
• Metals at the surface of last scatter
• Primordial Nucleosynthesis