A search for cosmic topology in the final WMAP data
A search for cosmic topology in the final WMAP data
复制标题
在最终 WMAP 数据中搜索宇宙拓扑
DOI：
10.1093/mnras/stt924
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发表时间：
2013
影响因子：
4.8
通讯作者：
S. Lustig
中科院分区：
文献类型：
--
作者：
R. Aurich;S. Lustig
在WMAP 9年最终数据中寻找相似温度波动的匹配圆对。如果宇宙空间是多重连接的，那么这样的特征是预料之中的。我们研究了CMB图的像素分辨率与高斯平滑之间的关系，以降低丢失匹配圆对的概率。利用WMAP卫星的特性生成具有3环面拓扑的CMB图，以确定在受探测器噪声干扰的CMB图中选择多大的平滑。V波段和W波段的数据对匹配的圆对进行了分析，并初步发现了一个圆对的信号，然而，它靠近银河系的平面。然而，这个信号是偶然产生的，是由于V和W波段图中包含的残余前景，还是由于真正的拓扑结构，这是不确定的。
A search for matched circle pairs of similar temperature fluctuations in the final WMAP 9yr data is carried out. Such a signature is expected if the space of the Universe is multi-connected. We investigate the relation between the pixel resolution of CMB maps and a Gaussian smoothing in order to lower the probability for missing matched circle pairs. CMB maps having the 3-torus topology are generated with the characteristics of the WMAP satellite in order to determine how large the smoothing should be chosen in CMB maps disturbed by detector noise. The V and W band data are analysed with respect to matched circle pairs and a tentatively signal is found for a circle pair, which lies, however, close to the plane of the Galaxy. It is, however, inconclusive whether this signal is generated by chance, is due to residual foregrounds contained in the V and W band maps, or is due to a genuine topology.
多面体双作用流形的宇宙拓扑
影响因子：
3.5
作者：
R. Aurich;S. Lustig
通讯作者：
S. Lustig
棱镜双作用流形的宇宙拓扑
影响因子：
3.5
作者：
R. Aurich;S. Lustig
通讯作者：
S. Lustig