The cut-sky cosmic microwave background is not anomalous
The cut-sky cosmic microwave background is not anomalous
复制标题
切空宇宙微波背景并非异常
DOI:
10.1103/physrevd.81.103008
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发表时间:
2010
影响因子:
5
通讯作者:
Pontzen A
中科院分区:
文献类型:
--
作者:
Pontzen A
The observed angular correlation function of the cosmic microwave background has previously been reported to be anomalous, particularly when measured in regions of the sky uncontaminated by Galactic emission. Recent work by Efstathiouet al.presents a Bayesian comparison of isotropic theories, casting doubt on the significance of the purported anomaly. We extend this analysis to all anisotropic Gaussian theories with vanishing mean (), using the much wider class of models to confirm that the anomaly is not likely to point to new physics. On the other hand if there is any new physics to be gleaned, it results from low-alignments which will be better quantified by a full-sky statistic. We also consider quadratic maximum likelihood power spectrum estimators that are constructed assuming isotropy. The underlying assumptions are therefore false if the ensemble is anisotropic. Nonetheless we demonstrate that, for theories compatible with the observed sky, these estimators (while no longer optimal) remain statistically superior to pseudo-power spectrum estimators.
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DOI:
10.1111/j.1365-2966.2007.12221.x
发表时间:
2007-06
影响因子:
4.8
作者:
A. Pontzen;A. R. I. Cambridge;Damtp Cambridge
通讯作者:
A. Pontzen;A. R. I. Cambridge;Damtp Cambridge
DOI:
--
发表时间:
2002
期刊:
影响因子:
--
作者:
A. D. Oliveira;Max Tegmark;C. O’Dell;B. Keating;P. Timbie;G. Efstathiou;G. Smoot
通讯作者:
G. Smoot
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
E. Bunn;Austin Bourdon
通讯作者:
Austin Bourdon
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
T. Jaffe;A. Banday;H. Eriksen;K. Górski;F. Hansen
通讯作者:
F. Hansen
影响因子:
8.7
作者:
Bennett, CL;Halpern, M;Weiland, JL
通讯作者:
Weiland, JL