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arXiv 0906.3520astro-ph.CO
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用层析测量约束修正的生长模式

Constraining modified growth patterns with tomographic surveys

Alessandra Silvestri

摘要:

可行的模型修改重力设计,以产生宇宙加速在当前的时代,密切模仿$Λ$ CDM模型在背景宇宙学的水平。然而,这种简并性一般在线性扰动的水平上被打破,其中修改引起了一种特殊的尺度依赖模式。在耦合的暗能量模型中也可以看到类似的模式。我介绍了Pogosian和Silvestri [1]发表的关于f(R)引力理论中结构增长的主要结果,以及Zhao等人[2]发表的关于即将到来的和未来的断层扫描调查的潜力的主要结果,以检测偏离广义相对论中预期的宇宙结构增长的宇宙学常数。

英文摘要:

Viable models of modified gravity designed to produce cosmic acceleration at the current epoch, closely mimic the $Λ$CDM model at the level of background cosmology. However, this degeneracy is generically broken at the level of linear perturbations, where the modifications induce a peculiar scale-dependent pattern. A similar pattern is expected in models of coupled dark energy. I present the main results published in Pogosian and Silvestri [1], on the growth of structure in f(R) theories of gravity, and in Zhao et al. [2], on the potential of upcoming and future tomographic surveys to detect departures from the growth of cosmic structure expected within General Relativity with a cosmological constant.

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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