CONTRIBUTION TO THE 3-POINT FUNCTION OF THE COSMIC MICROWAVE BACKGROUND FROM THE REES-SCIAMA EFFECT

被引:30
作者
MOLLERACH, S
GANGUI, A
LUCCHIN, F
MATARRESE, S
机构
[1] UNIV PADUA,DIPARTIMENTO ASTRON,I-35122 PADUA,ITALY
[2] UNIV PADUA,DIPARTIMENTO FIS G GALILEI,I-35131 PADUA,ITALY
关键词
COSMIC MICROWAVE BACKGROUND; GALAXIES; CLUSTERS; GENERAL;
D O I
10.1086/176363
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We compute the contribution to the three-point temperature correlation function of the cosmic microwave background coming from the nonlinear evolution of Gaussian initial perturbations, as described by the Reess-Sciama (or integrated Sachs-Wolfe) effect. By expressing the collapsed three-point function in terms of multipole amplitudes, we are able to calculate its expectation value for any power spectrum and for any experimental setting on large angular scales. We also give an analytical expression for the rms collapsed three-point function arising from the cosmic variance of a Gaussian fluctuation field. In the case of COBE DMR we find that the predicted signal is similar to 3 orders of magnitude below that expected from the cosmic variance.
引用
收藏
页码:1 / 5
页数:5
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