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北美退伍军人节(Veterans Day),12 日无更新
arXiv 1409.1114astro-ph.CO
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普朗克时代宇宙各向同性的检验

Test of cosmic isotropy in the Planck era

Yabebal Fantaye

摘要:

宇宙学的两个基本假设是,宇宙在大尺度上平均时是统计均匀的和各向同性的。鉴于这些假设的重大意义,已经进行了大量的统计测试来验证其有效性。自WMAP卫星首次发布高精度宇宙微波背景(CMB)数据以来,已经报道了许多挑战各向同性假设的异常,包括大角度尺度上的偶极功率不对称。在这次演讲中,我将简要总结我们在最新的WMAP和普朗克温度数据中进行的宇宙各向同性测试。

英文摘要:

The two fundamental assumptions in cosmology are that the Universe is statistically homogeneous and isotropic when averaged on large scales. Given the big implication of these assumptions, there has been a lot of statistical tests carried out to verify their validity. Since the first high-precision Cosmic Microwave Background (CMB) data release by the WMAP satellite, many anomalies that challenges the isotropy assumption, including dipolar power asymmetry on large angular scales, have been reported. In this talk I will present a brief summary of the test of cosmic isotropy we carried out in the latest WMAP and Planck temperature 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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