A New Helioseismic Constraint on a Cosmictime Variation of G
Abstract
The best available estimate of 8640 days of lowℓ BiSON data is used to constrain the evolution of Newton's constant over cosmic time. The effect of different chemical compositions and the impact of the theoretical uncertainties on the efficiency of the protonproton (pp) fusion crosssection have been considered within a Bayesian approach. The resulting new helioseismic limit on the variation of the gravitational constant turns out to be $ \dot{G}/G{ }_{t={t}_{0}}\lt 2\times {10}^{13}$ ∣ G ˙ / G ∣ t = t 0 < 2 × 10  13 yr^{1}.
 Publication:

The Astrophysical Journal
 Pub Date:
 April 2020
 DOI:
 10.3847/20418213/ab86b9
 Bibcode:
 2020ApJ...893L..35B
 Keywords:

 Helioseismology;
 Gravitation;
 Bayesian statistics;
 Stellar structures;
 Nonstandard theories of gravity;
 Fundamental parameters of stars;
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