标题： 银河系的周期性分布在广义标量张量理论中 显示英文标题

标题： Periodic distribution of galaxies in generalized scalar tensor theory

摘要： 借助Nordtvedt的标量张量理论，提出了一种非最小耦合标量场宇宙学的精确解析模型，在辐射时代引力耦合$G$和哈勃因子$H$发生振荡。 一个关键特征是这些振荡局限于辐射主导时代的早期阶段，而$G$趋近于其现在的常数值，同时$H$成为随时间单调递减的函数。 Brans-Dicke参数$\omega$被选择为Brans-Dicke标量场的函数，以避免与其现在值相关的观测约束发生冲突。 显示英文摘要

摘要： With the help of Nordtvedt's scalar tensor theory an exact analytical model of a non-minimally coupled scalar field cosmology in which the gravitational coupling $G$ and the Hubble factor $H$ oscillate during the radiation era is presented. A key feature is that the oscillations are confined to the early stages of the radiation dominated era with $G$ approaching its present constant value while $H$ becoming a monotonically decreasing function of time. The Brans Dicke parameter $\omega$ is chosen to be a function of Brans Dicke scalar field so that no conflict with observational constraints regarding its present value arises.