Scale-dependent bias from primordial non-Gaussianity in general relativity
Scale-dependent bias from primordial non-Gaussianity in general relativity
复制标题
广义相对论中原始非高斯性的尺度相关偏差
DOI:
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发表时间:
2009
期刊:
影响因子:
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通讯作者:
A. Slosar
中科院分区:
文献类型:
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作者:
D. Wands;A. Slosar
In this paper we examine the derivation of scale-dependent bias due to primordial non-Gaussianity of the local type in the context of general relativity. We justify the use of the Poisson equation in general relativistic perturbation theory and thus the derivation of scale-dependent bias as a test of primordial non-Gaussianity, using the spherical collapse model. The corollary is that the form of scale-dependent bias does not receive general relativistic corrections on scales larger than the Hubble radius. This leads to a formally divergent correlation function for biased tracers of the mass distribution which we discuss.