Integrated trispectrum detection from BOSS DR12 NGC CMASS

Integrated trispectrum detection from BOSS DR12 NGC CMASS
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来自 BOSS DR12 NGC CMASS 的集成三谱检测

DOI:
10.1088/1475-7516/2022/09/050
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发表时间:
2022
影响因子:
6.4
通讯作者:
L. Verde
L. Verde
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
D. Gualdi;L. Verde

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我们提出了第一次检测的综合三谱(i-三谱)的双极和四极信号从BOSS CMASS NGC DR 12。扩展的FKP估计形式主义的四点相关函数的傅立叶变换,我们测试散粒噪声减法,高斯的i-三谱数据向量,检测的意义和信号之间的相似性从数据和星系模拟目录用于数值估计的协方差矩阵。使用尺度对应的模式从最小k min = 0.03 h/Mpc到最大k max = 0.15 h/Mpc,我们发现一个检测的距离从零假设的(10.4,5.2,8.3,1.1,3.1)σ-区间的i-三谱?(0)和四极杆(?(2000年),?(0200),?(0020),?(0002))。这量化了BOSS数据上四点统计的物理信号的存在。为了完整性,同样的分析也进行功率谱和双谱,单极和四极。
We present the first detection of the integrated trispectrum (i-trispectrum) monopole and quadrupoles signal from BOSS CMASS NGC DR12. Extending the FKP estimators formalism to the Fourier transform of the four-point correlation function, we test shot-noise subtraction, Gaussianity of the i-trispectrum data-vector, significance of the detection and similarity between the signal from the data and from the galaxy mock catalogues used to numerically estimate the covariance matrix. Using scales corresponding to modes from minimum k min = 0.03 h/Mpc to maximum k max = 0.15 h/Mpc, we find a detection in terms of distance from the null hypothesis of (10.4,5.2,8.3,1.1,3.1) σ-intervals for the i-trispectrum monopole ?(0) and quadrupoles (?(2000),?(0200),?(0020),?(0002)) respectively. This quantifies the presence of the physical signal of the four-points statistics on BOSS data. For completeness the same analysis is also performed for power spectrum and bispectrum, both monopoles and quadrupoles.
DOI: 10.1051/0004-6361:20066170
发表时间: 2007-03-01
影响因子: 6.5
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