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arXiv 0906.0677gr-qcastro-ph.COhep-th
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大尺度宇宙微波背景各向异性中暗扇区相互作用的印记

The imprint of the interaction between dark sectors in large scale cosmic microwave background anisotropies

Jian-Hua He, Bin Wang, Pengjie Zhang

摘要:

暗能量与暗物质的相互作用是解决宇宙符合问题的一个有希望的模型。我们研究了这种相互作用在大尺度宇宙微波背景(CMB)温度各向异性下的特征。通过对暗能量和暗物质相互作用时的微扰方程的详细分析,我们发现大尺度CMB,特别是后期的积分Sachs-Wolfe效应,是测量暗扇区间耦合的有效工具。我们还讨论了通过互相关CMB图与示踪剂的大尺度结构的耦合检测的可能性。最后,我们使用CMB功率谱数据与其他观测数据一起进行全局拟合来约束耦合。我们发现在$1σ$范围内,暗扇区之间的约束耦合可以解决符合问题。

英文摘要:

Dark energy interacting with dark matter is a promising model to solve the cosmic coincidence problem. We study the signature of such interaction on large scale cosmic microwave background (CMB) temperature anisotropies. Based on the detail analysis in perturbation equations of dark energy and dark matter when they are in interaction, we find that the large scale CMB, especially the late Integrated Sachs Wolfe effect, is a useful tool to measure the coupling between dark sectors. We also discuss the possibility to detect the coupling by cross-correlating CMB maps with tracers of the large scale structure. We finally perform the global fitting to constrain the coupling by using the CMB power spectrum data together with other observational data. We find that in the $1σ$ range, the constrained coupling between dark sectors can solve the coincidence problem.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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