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Are redshift-space distortions actually a probe of growth of structure?

机译：红移空间扭曲实际上是结构生长的探针吗？

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摘要

Although multiple cosmological observations indicate the existence of dark matter and dark energy, cosmological tests of interactions between them have not yet been established. We point out that, in the presence of a coupling between dark matter and dark energy, a peculiar velocity of total matter field is determined not only by a logarithmic time-derivative of its density perturbation but also by density perturbations for both dark matter and baryonic matter, leading to a large modification of the physical interpretation of observed data obtained by measurements of redshift-space distortions. We reformulate a galaxy two-point correlation function in the redshift space based on the modified continuity and Euler equations. We conclude from the resultant formula that redshift space distortions provide us information on the coupling between dark matter and the scalar field by combining weak lensing measurements.
机译：虽然多个宇宙学观察表明暗物质和暗能的存在，但尚未建立它们之间的相互作用的宇宙学检测。 我们指出，在暗物质和暗能之间的耦合存在下，不仅通过其密度扰动的对数时间衍生物而且通过对暗物质和缩放的密度扰动来确定总物质场的特殊速度。 物质，导致对通过测量红移空间扭曲获得的观察数据的物理解释进行了大的修改。 基于修改的连续性和欧拉方程，我们在红移空间中重构了Galaxy两点相关函数。 我们通过结合弱镜头测量来源于，通过结合弱镜头测量来从所得公式中得出结论。

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