Constraints on the variations of fundamental couplings by stellar models

Details Constraints on the variations of fundamental couplings by stellar models Constraints on the variations of fundamental couplings by stellar models

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010hia....15..306c&link_type=abstract

Highlights of Astronomy, Volume 15, p. 306-306

Astronomy and Astrophysics

Astronomy

Cosmology: Theory, Pop Iii Stars, Nuclear Reactions, Nucleosynthesis, Abundances

Scientific paper

The effect of variations of the fundamental constants on the thermonuclear rate of the triple alpha reaction, 4He(αα,γ)12C, that bridges the gap between 4He and 12C is investigated. We follow the evolution of 15 and 60 M&sun; zero metallicity star models, up to the end of core helium burning. They are assumed to be representative of the first, Population III stars undergoing a very peculiar evolution due to the absence of initial CNO elements (zero metallicity). The calculated oxygen and carbon abundances resulting from helium burning can then be used to constrain the variations of the fundamental constants.

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