The Sun and the Newton Constant

Details The Sun and the Newton Constant The Sun and the Newton Constant

2002-04-29

arxiv.org/abs/astro-ph/0204482v1

Phys.Lett. B549 (2002) 20-25

Astronomy and Astrophysics

Astrophysics

11 pages, RevTeX file, 4 ps figures included

Scientific paper

10.1016/S0370-2693(02)02866-6

Several properties of the solar interior are determined with a very high accuracy, which in some cases is comparable to that achieved in the determination of the Newton constant $G_N$. We find that the present uncertainty $\Delta G_N/G_N=\pm 1.5\cdot 10^{-3}$ has significant effects on the profile of density and pressure, however it has negligible influence on the solar properties which can be measured by means of helioseismology and $^8{\rm B}$ neutrinos. Our result do not support recent claims that observational solar data can be used to determine the value of $G_N$ with an accuracy of few part in $10^{-4}$. Present data cannot constrain $G_N$ to much better than $10^{-2}$.

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