arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1302.4425astro-ph.COgr-qc
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深红移拓扑透镜:T^3候选者的策略

Deep redshift topological lensing: strategies for the T^3 candidate

Boudewijn F. Roukema, Martin J. France, Tomasz A. Kazimierczak, Thomas Buchert

摘要:

3-torus(T^3)FLRW模型比无限平坦模型更好地拟合WMAP CMB天图的近零大尺度自相关。T^3模型的WMAP参数意味着在z \sim 6处存在近似等红移的拓扑透镜效应。我们研究了拒绝T^3解或提供候选拓扑透镜星系对的观测策略。T^3完整性应用于(i)现有的z \sim 6观测和(ii)模拟观测,创建多连通目录。生成相应的单连通目录。每个目录进行分析,使用连续过滤方法和收集匹配的四元组。比较了复连通目录和单连通目录的四重统计量。如果测光红移精度为σ,则对于一对以T^3轴为中心的南北巡天,在5%的显著性下,该假设的预期拒绝或候选拓扑透镜星系的探测是可能的(\zphot)< 0.01,对于一对几乎完整的100度^2的巡天,总共有> 500个星系超过4.3 < z < 6.6,或者对于一对196度^2的巡天,其中星系数大于400,且σ(\zphot)< 0.02,4<z<7。从Δt =1 Gyr/h到Δt =0.1 Gyr/h,将一对中的最大时间间隔分别降低到σ(\zphot)< 0.005或σ(\zphot)< 0.01的要求。在未来的几十年里,数百万个z \sim 6星系将在这些大小的区域内被观测到,这意味着更强的约束。问题不在于假设是否会被拒绝或证实,而是什么时候。

英文摘要:

The 3-torus (T^3) FLRW model better fits the nearly zero large-scale auto-correlation of the WMAP CMB sky maps than the infinite flat model. The T^3 model's WMAP parameters imply approximately equal-redshift topological lensing at z \sim 6. We investigate observational strategies for rejecting the T^3 solution or providing candidate topologically lensed galaxy pairs. T^3 holonomies are applied to (i) existing z \sim 6 observations and (ii) simulated observations, creating multiply connected catalogues. Corresponding simply connected catalogues are generated. Each catalogue is analysed using a successive filter method and collecting matched quadruples. Quadruple statistics between the multiply and simply connected catalogues are compared. The expected rejection of the hypothesis, or detection of candidate topologically lensed galaxies, is possible at a significance of 5% for a pair of T^3 axis-centred northern and southern surveys if photometric redshift accuracy is σ(\zphot) < 0.01 for a pair of nearly complete 100 deg^2 surveys with a total of > 500 galaxies over 4.3 < z < 6.6, or for a pair of 196 deg^2 surveys with > 400 galaxies and σ(\zphot) < 0.02 over 4<z<7. Dropping the maximum time interval in a pair from Δt =1 Gyr/h to Δt =0.1 Gyr/h yields a requirement of σ(\zphot) < 0.005 or σ(\zphot) < 0.01, respectively. Millions of z \sim 6 galaxies will be observed over fields of these sizes during the coming decades, implying much stronger constraints. The question is not if the hypothesis will be rejected or confirmed, it is when.

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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