Supporting data for Eggemeier et al. (2025), "Boosting galaxy clustering analyses with non-perturbative modelling of redshift-space distortions"

This directory contains measurements of the power spectrum (PK) and bispectrum (BK) from the Minerva simulation suite, used in the analysis presented in "Boosting galaxy clustering analyses with non-perturbative modelling of redshift-space distortions" (Eggemeier et al., arXiv:2501.18597).  The averages of the measurements over the 300 realisations of the simulation suite are stored in the following four ASCII files:

Minerva_PK_z0.3_LOWZ.dat

Minerva_BK_z0.3_LOWZ.dat

Minerva_PK_z0.57_CMASS.dat

Minerva_BK_z0.57_CMASS.dat

for two different galaxy samples (LOWZ and CMASS). The power spectrum files contain the following columns:

k (bin centre) [h/Mpc]

k_eff (effective wave mode) [h/Mpc]

P_0 (power spectrum monopole) [(Mpc/h)^3]

P_2 (power spectrum quadrupole) [(Mpc/h)^3]

P_4 (power spectrum hexadecapole) [(Mpc/h)^3]

Poisson shot noise has been subtracted from these measurements. The binwidth corresponds to the fundamental frequency of the Fourier grid, which is kf = 2*pi/1500 h/Mpc, and the maximum wave mode is ~ 0.5 h/Mpc.

The bispectrum files contain the columns:

k1 (bin centre) [h/Mpc]

k2 (bin centre) [h/Mpc]

k3 (bin centre) [h/Mpc]

k1_eff (effective k1 wave mode) [h/Mpc]

k2_eff (effective k2 wave mode) [h/Mpc]

k3_eff (effective k3 wave mode) [h/Mpc]

B_0 (bispectrum monopole) [(Mpc/h)^6]

B_2 (bispectrum quadrupole) [(Mpc/h)^6]

Poisson shot noise has also been subtracted from these measurements. The bispectrum measurements use a bin width of 2*kf and contain all triangle configurations that satisfy k1 >= k2 >= k3 and k1 <= k2 + k3 with kmax ~ 0.2 h/Mpc (open triangle configurations, i.e., where the bin centres do not form a closed triangle, are not included).

In addition, this directory also contains covariance matrices that have been used in the analysis. These covariances do not correspond to the actually measured covariances from the ensemble of simulations, but are analytic Gaussian predictions scaled to a particular volume (see paper for details). They are contained in the following four ASCII files:

Minerva_PK_z0.3_LOWZ_cov.dat

Minerva_BK_z0.3_LOWZ_cov.dat

Minerva_PK_z0.57_CMASS_cov.dat

Minerva_BK_z0.57_CMASS_cov.dat

The power spectrum files are stored as a 2d matrix of 384 x 384 elements, corresponding to the concatenation of the 128 monopole, quadrupole, and hexadecapole bins each. The unit of the matrix elements are [(Mpc/h)^6]. The bispectrum files contain three columns corresponding to:

C_00 (diagonal of the auto bispectrum monopole covariance) [(Mpc/h)^6]

C_22 (diagonal of the auto bispectrum quadrupole covariance) [(Mpc/h)^6]

C_02 (diagonal of the cross bispectrum monopole-quadrupole covariance) [(Mpc/h)^6]

The ordering of the bins (triangle configurations) matches that of the bispectrum measurement files.

本目录收录了Minerva模拟套件的功率谱（power spectrum, PK）与双谱（bispectrum, BK）测量数据，相关分析成果发表于论文"Boosting galaxy clustering analyses with non-perturbative modelling of redshift-space distortions"（Eggemeier 等人，arXiv:2501.18597）。该数据集针对该模拟套件的300组模拟 realization（realization）样本的测量结果取平均，存储于以下四个ASCII文件中：

Minerva_PK_z0.3_LOWZ.dat
Minerva_BK_z0.3_LOWZ.dat
Minerva_PK_z0.57_CMASS.dat
Minerva_BK_z0.57_CMASS.dat

上述文件对应两个不同的星系样本（LOWZ与CMASS）。功率谱文件包含以下列：
k（分箱中心）[h/Mpc]
k_eff（有效波数）[h/Mpc]
P_0（功率谱单极矩）[(Mpc/h)^3]
P_2（功率谱四极矩）[(Mpc/h)^3]
P_4（功率谱十六极矩）[(Mpc/h)^3]

所有功率谱测量数据均已扣除泊松散粒噪声（Poisson shot noise）。该数据集的分箱宽度对应傅里叶网格的基频kf = 2π/1500 h/Mpc，最大波数约为0.5 h/Mpc。

双谱文件包含以下列：
k1（分箱中心）[h/Mpc]
k2（分箱中心）[h/Mpc]
k3（分箱中心）[h/Mpc]
k1_eff（k1有效波数）[h/Mpc]
k2_eff（k2有效波数）[h/Mpc]
k3_eff（k3有效波数）[h/Mpc]
B_0（双谱单极矩）[(Mpc/h)^6]
B_2（双谱四极矩）[(Mpc/h)^6]

双谱测量数据同样已扣除泊松散粒噪声。其分箱宽度为2*kf，包含所有满足k1 ≥ k2 ≥ k3且k1 ≤ k2 + k3的三角构型，最大波数kmax ~ 0.2 h/Mpc（不包含开放三角构型，即分箱中心无法构成闭合三角形的构型）。

此外，本目录还收录了分析中使用的协方差矩阵（covariance matrix）。这些协方差并非来自模拟系综的实际测量协方差，而是缩放至特定体积的解析高斯预测（详情参见论文），存储于以下四个ASCII文件中：

Minerva_PK_z0.3_LOWZ_cov.dat
Minerva_BK_z0.3_LOWZ_cov.dat
Minerva_PK_z0.57_CMASS_cov.dat
Minerva_BK_z0.57_CMASS_cov.dat

功率谱协方差文件为384×384的二维矩阵，对应128个单极矩、128个四极矩与128个十六极矩分箱的拼接结果，矩阵元素的单位为[(Mpc/h)^6]。双谱协方差文件包含三列，分别对应：
C_00（自双谱单极矩协方差的对角元）[(Mpc/h)^6]
C_22（自双谱四极矩协方差的对角元）[(Mpc/h)^6]
C_02（双谱单极矩-四极矩交叉协方差的对角元）[(Mpc/h)^6]

分箱（三角构型）的排序与双谱测量文件完全一致。