利用太阳测试引力的替代理论
Testing alternative theories of gravity using the Sun
摘要：
我们提出了一种新的方法来测试可能的修正牛顿引力使用太阳物理。目前太阳模型的高精度和新的精确观测使人们能够将标准重力的修正限制在前所未有的水平。我们的案例研究是爱丁顿启发的引力，一个有吸引力的修改后的引力理论，导致非奇异宇宙学和崩溃。这个理论相当于真空中的标准引力，但在物质中它与标准引力明显不同，例如它影响太阳的演化和平衡结构，给出不同的核心温度分布，观测到的声学模式和太阳中微子通量的偏差。将修正的太阳模型的预测与观测结果进行比较，我们将理论的耦合参数限制为|kappa_g| <3 × 10^5 m^5 s^2 / kg。我们的研究结果表明，太阳可以用来有效地约束其他引力理论。
英文摘要：
We propose a new approach to test possible corrections to Newtonian gravity using solar physics. The high accuracy of current solar models and new precise observations allow one to constrain corrections to standard gravity at unprecedented levels. Our case study is Eddington-inspired gravity, an attractive modified theory of gravity which results in non-singular cosmology and collapse. The theory is equivalent to standard gravity in vacuum, but it sensibly differs from it within matter, for instance it affects the evolution and the equilibrium structure of the Sun, giving different core temperature profiles, deviations in the observed acoustic modes and in solar neutrino fluxes. Comparing the predictions from a modified solar model with observations, we constrain the coupling parameter of the theory, |kappa_g| < 3x10^5 m^5 s^2 / kg. Our results show that the Sun can be used to efficiently constraint alternative theories of gravity.
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