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Effects of the variation of fundamental constants on Pop III stellar evolution

Abstract : The effect of variations of the fundamental constants on the thermonuclear rate of the triple alpha reaction, (4)He(alpha alpha, gamma)(12)C, that bridges the gap between (4)He and (12)C is investigated. We have followed the evolution of 15 and 60 M(circle dot) zero metallicity stellar models, up to the end of core helium burning. They are assumed to be representative of the first (Population III) stars. The calculated oxygen and carbon abundances resulting from helium burning can then be used to constrain the variation of the fundamental constants.
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Submitted on : Thursday, July 21, 2011 - 3:13:23 PM
Last modification on : Wednesday, September 16, 2020 - 4:07:36 PM

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A. Coc, S. Ekstrom, P. Descouvemont, G. Meynet, J.P. Uzan, et al.. Effects of the variation of fundamental constants on Pop III stellar evolution. 10th International Symposium on Origin of Matter and Evolution of Galaxies (OMEG10), Mar 2010, Osaka, Japan. pp.21-26, ⟨10.1063/1.3485139⟩. ⟨in2p3-00610299⟩

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