Inhomogeneous non-Gaussianity
Inhomogeneous non-Gaussianity
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DOI：
10.1088/1475-7516/2012/03/012
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发表时间：
2011-11
期刊：
影响因子：
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通讯作者：
C. Byrnes;Sami Nurmi;G. Tasinato;D. Wands
中科院分区：
文献类型：
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作者：
C. Byrnes;Sami Nurmi;G. Tasinato;D. Wands
我们提出了一种方法，通过局部非高斯参数的不均匀性，如f_NL，在较小的补丁的天空中测量，探测原始密度场的高阶标量。在一片天空中测量的n点函数和在另一片天空中测量的k点函数之间的相关器取决于整个天空上的（n+k）点函数。非高斯参数的不均匀性可能是一种可行的方法来检测或约束非高斯局部模型中的高阶扰动，以及区分产生原始密度扰动的单源和多源场景，更普遍地探测暴胀物理学的细节。
We propose a method to probe higher-order correlators of the primordial density field through the inhomogeneity of local non-Gaussian parameters, such as f_NL, measured within smaller patches of the sky. Correlators between n-point functions measured in one patch of the sky and k-point functions measured in another patch depend upon the (n+k)-point functions over the entire sky. The inhomogeneity of non-Gaussian parameters may be a feasible way to detect or constrain higher-order correlators in local models of non-Gaussianity, as well as to distinguish between single and multiple-source scenarios for generating the primordial density perturbation, and more generally to probe the details of inflationary physics.