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THREE-POINT CORRELATIONS IN THE COBE DMR 2 YEAR ANISOTROPY MAPS

机译:COBE DMR 2年各向异性映射中的三点关联

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We compute the three-point temperature correlation function of the COBE Differential Microwave Radiometer (DMR) 2 year sky maps to search for evidence of non-Gaussian temperature fluctuations. We detect three-point correlations in our sky with a substantially higher signal-to-noise ratio than from the first-year data. However, the magnitude of the signal is consistent with the level of cosmic variance expected from Gaussian fluctuations, even when the low-order multipole moments, up to l = 9, are filtered from the data. These results do not strongly constrain most existing models of structure formation, but the absence of intrinsic three-point correlations on large angular scales is an important consistency test for such models.
机译:我们计算COBE微分微波辐射计(DMR)2年天空图的三点温度相关函数,以寻找非高斯温度波动的证据。与第一年的数据相比,我们在天空中检测到的三点关联具有更高的信噪比。但是,即使从数据中滤出了高达l = 9的低阶多极矩,信号的大小也与高斯涨落预期的宇宙方差水平一致。这些结果并没有强烈地约束大多数现有的结构形成模型,但是在大角度尺度上不存在固有的三点相关性是此类模型的重要一致性测试。

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