Institute for Astronomy, University of Edinburgh, Blackford Hill, Edinburgh EH9 3HJ, United Kingdom.
Phys Rev Lett. 2013 Sep 13;111(11):111302. doi: 10.1103/PhysRevLett.111.111302. Epub 2013 Sep 9.
We argue that the observed large-scale cosmic microwave anomalies, discovered by WMAP and confirmed by the Planck satellite, are most naturally explained in the context of a marginally open universe. Particular focus is placed on the dipole power asymmetry, via an open universe implementation of the large-scale gradient mechanism of Erickcek et al. Open inflation models, which are motivated by the string landscape and which can excite "supercurvature" perturbation modes, can explain the presence of a very-large-scale perturbation that leads to a dipole modulation of the power spectrum measured by a typical observer. We provide a specific implementation of the scenario which appears compatible with all existing constraints.
我们认为，由 WMAP 发现并被 Planck 卫星证实的大尺度宇宙微波异常现象，最自然地可以用边缘开放宇宙的观点来解释。通过对 Erickcek 等人的大尺度梯度机制的开放宇宙实现，特别关注偶极功率不对称性。由弦景观激发的开放暴胀模型可以激发“超曲率”扰动模式，它们可以解释存在非常大尺度的扰动，从而导致典型观察者测量的功率谱的偶极调制。我们提供了一种与所有现有约束条件都相容的具体方案。
