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arXiv 0707.0190astro-ph
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WMAP-3 yr数据精细结构常数随时间变化的约束条件

Constraints on time variation of fine structure constant from WMAP-3yr data

Petruta Stefanescu

摘要:

本文给出了对WMAP-3年宇宙微波背景(CMB)数据的分析结果,以及HST Hubble关键项目中Hubble膨胀率的附加先验,给出了对复合时精细结构常数相对于其当前值Δ_alpha =(alpha_rec-alpha_0)/ alpha_0随时间变化的约束条件。我发现在95% C. L.时-0.039这使得WMAP-1 yr数据的先前限制提高了30%。与WMAP-1 yr数据相比,相应的复合红移为1012 <zrec < 1115,表明复合期延迟。

英文摘要:

This paper presents the constraints on the time variation of the fine structure constant at recombination relative to its present value, Delta_alpha = (alpha_rec-alpha_0) / alpha_0, obtained from the analysis of the WMAP-3yr Cosmic Microwave Background (CMB) data, with an additional prior on the Hubble expansion rate from HST Hubble Key Project. I found out that -0.039 < Delta_alpha < 0.010 at 95% C.L., which brings a 30% improvement to the previous limits from WMAP-1yr data. The corresponding recombination redshift, 1012 < z_rec < 1115, shows a delayed recombination epoch compared with the results from WMAP-1yr data.

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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