轨道折线拓扑与宇宙微波背景
Orbifold Line Topology and the Cosmic Microwave Background
摘要:
我们扩展我们的研究与非经典弦拓扑的宇宙,并考虑一个orbifold线拓扑,$\mathbb{R}\times\mathbb{R}^2/\mathbb{Z}_p$。该拓扑具有固定的线,并将空间中的每个点与$p-1$其他点标识。CMB上的轨道线的一个可观察到的印记是出现多达$(p-1)/2$对的匹配圆。搜索WMAP数据中的匹配圆,我们可以排除$p$高达10的轨道线拓扑,除了$p=8$。虽然$p=8$峰值的重要性在WMAP的数据发布之间有所不同,但它没有出现在普朗克数据中,这也使我们能够排除$p=8$。
英文摘要:
We extend our study of a universe with a non-classical stringy topology, and consider an orbifold line topology, $\mathbb{R}\times\mathbb{R}^2/\mathbb{Z}_p$. This topology has a fixed line and identifies each point in space with $p-1$ other points. An observable imprint of an orbifold line on the CMB is the appearance of up to $(p-1)/2$ pairs of matching circles. Searching the WMAP data for matching circles, we can rule out an orbifold line topology with $p$ up to 10, except for $p=8$. While the significance of the peak at $p=8$ varies between data releases of WMAP, it does not appear in Planck data, enabling us to rule out $p=8$ as well.
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