Bianchi VII h models and the cold spot texture
Bianchi VII h models and the cold spot texture
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Bianchi VII h 型号和冷点纹理
DOI：
10.1111/j.1365-2966.2008.13835.x
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发表时间：
2008
影响因子：
4.8
通讯作者：
Bridges M
中科院分区：
文献类型：
--
作者：
Bridges M
鉴于克鲁兹等人的建议，即在南银河系极点附近观察到的冷点可能是宇宙结构的残余温度扰动，我们回到了之前的比安奇VII分析。Bridges等人使用了两个受欢迎的左手比安奇VII模板，并限制了先验概率，使模板集中在冷点附近。使用威尔金森微波各向异性探测器（WMAP）的数据“校正”的纹理拟合，我们现在已经重新检查了这两个模型，以评估这些结论的任何变化。我们发现，这两个模型几乎完全不受数据的约束，因此表现出显着减少贝叶斯证据。这两种模型现在都不受数据的青睐。这一结果加强了我们以前的断言，冷点是显着的检测的比安奇VII h组件。
We have returned to our previous Bianchi VIIhanalysis in light of the Cruz et al. suggestion that the cold spot observed near the Southern Galactic Pole may be a remnant temperature perturbation of a cosmic texture. Bridges et al. used two favoured left-handed Bianchi VIIhtemplates with restricted prior probabilities so that the template was centred close to the cold spot. UsingWilkinson Microwave Anisotropy Probe(WMAP) data ‘corrected’ for the texture fit we have now re-examined both models to assess any changes to these conclusions. We find that both models are left almost entirely unconstrained by the data and consequently exhibit significantly reduced Bayesian evidences. Both models are nowdisfavouredby the data. This result reinforces our previous assertion that the cold spot was significant in the detection of a Bianchi VIIhcomponent.