Journal Article

Light element evolution resulting from <i>WMAP</i> data

Donatella Romano, Monica Tosi, Francesca Matteucci and Cristina Chiappini

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 346, issue 1, pages 295-303
Published in print November 2003 | ISSN: 0035-8711
Published online November 2003 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1046/j.1365-2966.2003.07083.x
Light element evolution resulting from WMAP data

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Abstract

The recent determination of the baryon-to-photon ratio from Wilkinson Microwave Anisotropy Probe (WMAP) data by Spergel et al. allows one to fix, with unprecedented precision, the primordial abundances of the light elements D, 3He, 4He and 7Li in the framework of the standard model of big bang nucleosynthesis. We adopt these primordial abundances and discuss the implications for Galactic chemical evolution, stellar evolution and nucleosynthesis of the light elements. The model predictions on D, 3He and 4He are in excellent agreement with the available data, while a significant depletion of 7Li in low-metallicity stars is required to reproduce the Spite plateau.

Keywords: nuclear reactions, nucleosynthesis, abundances; Galaxy: abundances; Galaxy: evolution

Journal Article.  6870 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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