Optimal limits on f_{NL}^{local} from WMAP 5-year data

Optimal limits on f_{NL}^{local} from WMAP 5-year data
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WMAP 5 年数据中 f_{NL}^{local} 的最佳限制

DOI:
10.1088/1475-7516/2009/09/006
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发表时间:
2009
期刊:
arXiv: Cosmology and Nongalactic Astrophysics
影响因子:
--
通讯作者:
M. Zaldarriaga
M. Zaldarriaga
中科院分区:
--
文献类型:
--
作者:
Kendrick M. Smith;L. Senatore;M. Zaldarriaga

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我们将f_{NL}^{local}的最优估计应用于5年WMAP资料。在前景模板的幅度上边缘化,我们在95%CL下得到-4 < f_{NL}^{local} < 80。以前(次优)分析的误差线比这些大大约40%。使用我们的估计器分析的高斯模拟结果在幅度上大于我们发现的结果的概率为7%。我们的管道给出了一致的结果时,适用于三年和五年的WMAP数据发布,并同意从我们自己的次优管道的结果。我们没有发现任何残留的前景污染的证据。
We have applied the optimal estimator for f_{NL}^{local} to the 5 year WMAP data. Marginalizing over the amplitude of foreground templates we get -4 < f_{NL}^{local} < 80 at 95% CL. Error bars of previous (sub-optimal) analyses are roughly 40% larger than these. The probability that a Gaussian simulation, analyzed using our estimator, gives a result larger in magnitude than the one we find is 7%. Our pipeline gives consistent results when applied to the three and five year WMAP data releases and agrees well with the results from our own sub-optimal pipeline. We find no evidence of any residual foreground contamination.
DOI: 10.1088/0067-0049/192/2/18
发表时间: 2011-02-01
影响因子: 8.7
作者:
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者: Wright, E. L.