Skewness consistency relation in large-scale structure and test of gravity theory
Skewness consistency relation in large-scale structure and test of gravity theory
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大尺度结构中的偏态一致性关系及引力理论检验
DOI：
10.1103/physrevd.107.043526
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发表时间：
2023
影响因子：
5
通讯作者：
Tomo Takahashi
中科院分区：
文献类型：
--
作者：
Daisuke Yamauchi;Shoya Ishimaru;Takahiko Matsubara;Tomo Takahashi
我们研究星系数密度涨落的偏度，作为检验引力理论的一个可能的探针。我们发现偏度参数的特定线性组合对应于密度对比度的二阶核的系数，这可以被视为相容性关系，并用作广义相对论和修正引力理论的检验。我们还将对偏度参数的分析从真实的空间推广到红移空间，并导出了红移空间的偏度一致性关系。
We investigate the skewness of galaxy number density fluctuations as a possible probe to test gravity theories. We find that the specific linear combination of the skewness parameters corresponds to the coefficients of the second-order kernels of the density contrast, which can be regarded as the consistency relation and used as a test of general relativity and modified gravity theories. We also extend the analysis of the skewness parameters from real space to redshift space and derive the redshift-space skewness consistency relation.