Large-angle cosmic microwave background suppression and polarization predictions
Large-angle cosmic microwave background suppression and polarization predictions
复制标题
大角度宇宙微波背景抑制和偏振预测
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
G. Starkman
中科院分区：
文献类型：
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作者：
C. Copi;D. Huterer;D. Schwarz;G. Starkman
自COBE-DMR首次观测到宇宙微波背景（CMB）并随后由威尔金森微波各向异性探测器证实和加强以来，异常缺乏大角度温度相关性一直是宇宙微波背景（CMB）的一个令人惊讶的特征。这种异常可能表明需要修改宇宙学的标准模型，或者可能表明我们的宇宙在该模型中是一个罕见的统计波动。对温度自相关函数的进一步观察将无法阐明这一问题；足够高精度的统计观测已经存在。相反，需要其他探针。在这项工作中，我们探讨了对即将到来的极化观测的期望。我们定义了一个公式来测试假设，即宇宙中大角度的CMB温度扰动代表了标准宇宙模型中罕见的统计波动。这些测试是基于温度- q斯托克斯参数的相关性。不幸的是，这些测试不能被期望是决定性的。然而，我们确实表明，如果观察到这种tq相关性在适当选择的角度范围内足够大，那么假设可以在高置信度水平上被拒绝。我们量化了这些陈述，并优化了我们构建的统计数据，以应用于预期的极化数据。我们发现，我们可以构建一个统计数据，它有25%的机会排除我们生活在一个罕见的
The anomalous lack of large-angle temperature correlations has been a surprising feature of the cosmic microwave background (CMB) since first observed by COBE-DMR and subsequently confirmed and strengthened by the Wilkinson Microwave Anisotropy Probe. This anomaly may point to the need for modifications of the standard model of cosmology or may indicate that our Universe is a rare statistical fluctuation within that model. Further observations of the temperature auto-correlation function will not elucidate the issue; sufficiently high-precision statistical observations already exist. Instead, alternative probes are required. In this work, we explore the expectations for forthcoming polarization observations. We define a prescription to test the hypothesis that the large-angle CMB temperature perturbations in our Universe represent a rare statistical fluctuation within the standard cosmological model. These tests are based on the temperature-Q Stokes parameter correlation. Unfortunately, these tests cannot be expected to be definitive. However, we do show that if this TQ-correlation is observed to be sufficiently large over an appropriately chosen angular range, then the hypothesis can be rejected at a high confidence level. We quantify these statements and optimize the statistics we have constructed to apply to the anticipated polarization data. We find that we can construct a statistic that has a 25 per cent chance of excluding the hypothesis that we live in a rare
影响因子：
8.7
作者：
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者：
Wright, E. L.
CMB 各向同性异常模型的可测试偏振预测
影响因子：
5
作者：
Dvorkin C
通讯作者：
Dvorkin C