Angular trispectrum of CMB temperature anisotropy from primordial non-Gaussianity with the full radiation transfer function
Angular trispectrum of CMB temperature anisotropy from primordial non-Gaussianity with the full radiation transfer function
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具有全辐射传递函数的原初非高斯 CMB 温度各向异性的角三谱
DOI：
10.1103/physrevd.73.083007
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发表时间：
2006
影响因子：
5
通讯作者：
E. Komatsu
中科院分区：
文献类型：
--
作者：
N. Kogo;E. Komatsu
我们根据以常数非线性耦合参数 f{sub NL} 为特征的原初曲率扰动中的原初非高斯性，计算宇宙微波背景 (CMB) 角三谱、四点相关函数的球谐变换。我们充分考虑了辐射传递函数的影响，从而提供了CMB温度各向异性角三谱信噪比的最准确估计。我们发现，给定 l 的三谱预测信噪比约为幂律 (S/N)( 或约 50。我们还报告了三谱幅度的预测约束，这对于其他非高斯模型（例如曲线模型）可能有用。
We calculate the cosmic microwave background (CMB) angular trispectrum, spherical harmonic transform of the four-point correlation function, from primordial non-Gaussianity in primordial curvature perturbations characterized by a constant nonlinear coupling parameter, f{sub NL}. We fully take into account the effect of the radiation transfer function, and thus provide the most accurate estimate of the signal-to-noise ratio of the angular trispectrum of CMB temperature anisotropy. We find that the predicted signal-to-noise ratio of the trispectrum summed up to a given l is approximately a power-law (S/N)( or approx. 50. We also report the predicted constraints on the amplitude of trispectrum, which may be useful for other non-Gaussian models such as curvaton models.