Bianchi VII_h模型和冷点纹理
Bianchi VII_h models and the cold spot texture
摘要：
根据Cruz等人在2007年提出的银河系南极附近观测到的冷点可能是宇宙结构的残余温度扰动的建议，我们回到了之前的Bianchi VII_h分析。在Bridges等人2006 b中，我们发现了两个有利的左手Bianchi VII_h模板，其先验概率受到限制，因此模板的中心靠近冷点。使用WMAP数据“校正”的纹理适合，我们现在已经重新检查了两个模型，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之前的建议，即冷点可能是驱动任何比安奇VII_h检测。
英文摘要：
We have returned to our previous Bianchi VII_h analysis in light of the Cruz et al. 2007 suggestion that the cold spot observed near the southern Galactic pole may be a remnant temperature perturbation of a cosmic texture. In Bridges et al. 2006b we found two favoured left handed Bianchi VII_h templates with restricted prior probabilities so that the template was centred close to the cold spot. Using WMAP data `corrected' for the texture fit we have now reexamined 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 now disfavoured by the data. This result reinforces our previous suggestion that the cold spot was likely to be driving any Bianchi VII_h detection.
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