超越红移巡天的界限：在“超级巡天”尺度上评估质量涨落
Beyond boundaries of redshift surveys: assessing mass fluctuations on "super-survey" scales
摘要：
观测到的密度场在红移空间中直接受到径向运动的影响，这些径向运动是由给定星系红移巡天所占据的体积之外的质量波动产生的。这些运动引入了红移空间的各向异性，这些各向异性在距离巡天中心更远的地方更加明显，从而为超级巡天尺度上的质量波动的性质提供了线索。此外，我们注意到，来自红移空间扭曲的增长因子的所有估计的基础上的关系，明确假设的速度场产生的质量波动内的调查体积。这可能会导致这些估计数的不确定性，其数量级为百分之几。
英文摘要：
The observed density field in redshift space is directly affected by the radial motions generated from mass fluctuations outside the volume occupied by a given galaxy redshift survey. These motions introduce redshift space anisotropies which are more pronounced at larger distances from the survey's center, thus offering clues to the nature of mass fluctuations on super-survey scales. Furthermore, we note that all estimates of the growth factor derived from redshift space distortions are based on relations which explicitly assume that the velocity field is generated by mass fluctuations inside the survey volume. This may cause uncertainties in these estimates which are on the order of a few percent.
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