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arXiv 0907.1830hep-thastro-ph.COgr-qchep-ph
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f（G）引力模型对太阳系的约束

Solar system constraints on f(G) gravity models

Antonio De Felice, Shinji Tsujikawa

备注：
19 pages, uses ReVTeX
发表信息：
Phys.Rev.D80:063516,2009
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摘要：

讨论了太阳系对f（G）引力模型的约束，其中f是Gauss-Bonnet项G的函数。我们专注于宇宙学上可行的f（G）模型，可以负责后期的宇宙加速。这些模型通常会对真空史瓦西解进行修正，修正形式为ψ *（r/rs）^p，其中ψ = H^2 rs^2 << 1，rs是太阳的史瓦西半径，H是今天的哈勃参数。我们通常估计修改广义相对论的强度，以便用一些实验来对抗模型，如光的偏转和近日点移动。我们证明了宇宙学上可行的f（G）模型在很宽的模型参数范围内可以与太阳系约束相一致。

英文摘要：

We discuss solar system constraints on f(G) gravity models, where f is a function of the Gauss-Bonnet term G. We focus on cosmologically viable f(G) models that can be responsible for late-time cosmic acceleration. These models generally give rise to corrections of the form epsilon*(r/rs)^p to the vacuum Schwarzschild solution, where epsilon = H^2 rs^2 << 1, rs is the Schwarzschild radius of Sun, and H is the Hubble parameter today. We generally estimate the strength of modifications to General Relativity in order to confront models with a number of experiments such as the deflection of light and the perihelion shift. We show that cosmologically viable f(G) models can be consistent with solar system constraints for a wide range of model parameters.

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