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arXiv 1606.02520astro-ph.CO
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红移空间功率谱的微扰方法:超越标准模型

A Perturbative Approach to the Redshift Space Power Spectrum: Beyond the Standard Model

Benjamin Bose, Kazuya Koyama

摘要:

基于标准微扰理论(SPT),我们开发了一个单圈级的红移空间功率谱产生程序。该代码可以适用于广泛的修改后的重力和暗能量模型,使用最近提出的数值方法由A.Taruya。这包括Horndeski的理论与一般的潜力,其中包括变色龙和Vainshtein屏蔽机制,并提供了一个非线性扩展的有效理论的暗能量高达三阶。重点是最近的一个非线性模型的红移空间功率谱已被证明模型的各向异性非常好地在相关尺度的SPT框架,以及捕捉相关的非线性效应典型的修改后的重力理论。我们提供了代码的一致性检查,对既定的结果,并阐明它的应用范围内即将到来的高精度RSD数据。

英文摘要:

We develop a code to produce the power spectrum in redshift space based on standard perturbation theory (SPT) at 1-loop order. The code can be applied to a wide range of modified gravity and dark energy models using a recently proposed numerical method by A.Taruya. This includes Horndeski's theory with a general potential, which accommodates both chameleon and Vainshtein screening mechanisms and provides a non-linear extension of the effective theory of dark energy up to third order. Focus is on a recent non-linear model of the redshift space power spectrum which has been shown to model the anisotropy very well at relevant scales for the SPT framework, as well as capturing relevant non-linear effects typical of modified gravity theories. We provide consistency checks of the code against established results and elucidate it's application within the light of upcoming high precision RSD data.

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