Updated Big Bang nucleosynthesis confronted to WMAP observations and to the abundance of light elements

By A. Coc, E. Vangioni‐Flam, P. Descouvemont, A. Adahchour, C. Angulo. 2003

301 citations recorded by the source corpus.

We improve Standard Big Bang Nucleosynthesis (SBBN) calculations taking into account new nuclear physics analyses (Descouvemont et al. 2003). Using a Monte-Carlo technique, we calculate the abundances of light nuclei versus the baryon to photon ratio.The results concerning omegab are compared to relevant astrophysical and cosmological observations. Consistency between WMAP, SBBN results and D/H data strengthens the deduced baryon density and has interesting consequences on cosmic chemical evolution. A significant discrepancy between the calculated Li-7 deduced from WMAP and the Spite plateau is clearly revealed. To explain this discrepancy three possibilities are invoked : uncertainties on the Li abundance, surface alteration of Li in the course of stellar evolution or poor knowledge of the reaction rates related to Be-7 destruction. In particular, the possible role of the up to now neglected Be-7(d,p)2He-4 and Be-7(d,alpha)Li5 reactions is considered. The impressive advances in CMB observations provide a strong motivation for more efforts in experimental nuclear physics and high quality spectroscopy to keep BBN in pace. Comment: accepted in ApJ, 22 pages, 5 figures

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/c54e318a8ab49e05663c31f5e8ef164656665904

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Citations in the corpus

The Dawes Review 2: Nucleosynthesis and Stellar Yields of Low- and Intermediate-Mass Single Stars (2014, unknown): “The currently accepted value is 3He/H = 1.00± 0.07× 10−5 according to Cyburt et al. (2008) and 3He/H = 1.04± 0.04× 10−5 according to Coc et al. (2004).”
Fast rotating massive stars and the origin of the abundance patterns in galactic globular clusters (2006, background): “If we assume that the initial lithium abundance of the intracluster gas corresponds to the cosmological value of 2.61 (Coc et al. 2004) and that no lithium is present in the wind of massive stars, we need to add about 30% of pristine gas to those winds to obtain the extreme value of lithium (see…”
Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies (2005, background): “…Tegmark et al. 2004b), the Lyman-alpha forest (McDonald et al. 2004; Seljak et al. 2004), and big bang nucleosynthesis (e.g., Burles et al. 2001; Coc et al. 2004), constrain Ωbh 2 and n rather well and so to begin, we hold these parameters fixed (at 0.024 and 0.98, respectively), and consider…”
The fraction of second generation stars in globular clusters from the analysis of the horizontal branch (2008, unknown): “The extra– helium allows these latter stars to reach the bluer positions beyond the variable region, to which they should have been confined by a chemical composition of Y∼0.24 and Z∼0.001.”
Evolution and nucleosynthesis of extremely metal-poor and metal-free low- and intermediate-mass stars - I. Stellar yield tables and the CEMPs (2008, methodology): “Initial composition for the Z=0 models was taken from the Standard Big Bang nucleosynthesis calculations of Coc et al. (2004), whilst the initial composition for the EMP models was derived by mixing the ejecta from a 20 M⊙ Z=0 supernova calculation (Limongi 2002, private communication) with varying…”
Implications of WMAP Observations on Li Abundance and Stellar Evolution Models (2004, background): “Given that the WMAP implications for Li cosmological abundance and the Li Spite plateau can be naturally explained by gravitational settling in presence of weak turbulence, there appears little need for exotic physics as suggested by Ichikawa et al. (2004) and Coc et al. (2004) for instance.”
Precision big bang nucleosynthesis with improved Helium-4 predictions (2018, background): “In our earliest works (e.g. Coc et al. (2004)), since the observational uncertainties on YP were large, we neglected some of the corrections discussed here because we were unable to calculate them (e.g. including six–fold integrals).”
STANDARD BIG BANG NUCLEOSYNTHESIS UP TO CNO WITH AN IMPROVED EXTENDED NUCLEAR NETWORK (2011, background): “(Coc et al. 2004).”