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arXiv 0709.1403gr-qc
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变G和λ(c)的球对称ADM引力

Spherically symmetric ADM gravity with variable G and Lambda(c)

Giampiero Esposito, Claudio Rubano, Paolo Scudellaro

摘要:

本文研究了具有变牛顿参数G和宇宙项λ(c)的球对称引力的Arnowitt-Deser-Misner(以下简称ADM)形式。牛顿参数在这里被视为一个动态变量,而不仅仅是一个外部参数,在以前的工作密切相关的主题。由此产生的汉密尔顿方程;有趣的是,存在一个静态的解决方案,减少到史瓦西几何在常数G的限制,描述了牛顿参数由径向变量r的非线性微分方程。一个值得注意的极限情况是牛顿参数在大r时服从几乎线性增长律。在宇宙学常数为零的情况下,得到了G作为r的函数的精确解.这些解决方案的一些观测的影响,并简要讨论。

英文摘要:

This paper investigates the Arnowitt--Deser--Misner (hereafter ADM) form of spherically symmetric gravity with variable Newton parameter G and cosmological term Lambda(c). The Newton parameter is here treated as a dynamical variable, rather than being merely an external parameter as in previous work on closely related topics. The resulting Hamilton equations are obtained; interestingly, a static solution exists, that reduces to Schwarzschild geometry in the limit of constant G, describing a Newton parameter ruled by a nonlinear differential equation in the radial variable r. A remarkable limiting case is the one for which the Newton parameter obeys an almost linear growth law at large r. An exact solution for G as a function of r is also obtained in the case of vanishing cosmological constant. Some observational implications of these solutions are obtained and briefly discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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