Optimal limits on f_{NL}^{local} from WMAP 5-year data
Optimal limits on f_{NL}^{local} from WMAP 5-year data
复制标题
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:
影响因子:
--
通讯作者:
M. Zaldarriaga
中科院分区:
文献类型:
--
作者:
Kendrick M. Smith;L. Senatore;M. Zaldarriaga
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.
影响因子:
8.7
作者:
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者:
Wright, E. L.