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arXiv 0706.3908astro-ph
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通过CMB光球层的变化测量宇宙的膨胀

Measuring the Expansion of the Universe Through Changes in the CMB Photosphere

S. Lange, L. Page

摘要:

宇宙的膨胀可以通过测量CMB中各向异性模式的变化来“实时”观察。随着宇宙年龄的增长,解耦的表面-或CMB光球-远离我们并采样不同的引力景观。中巴对这种新情况的反应,与我们今天所看到的不同。最大的变化发生在l~900。我们表明,与一个阵列的探测器,我们可以设想在几十年内,人们可以在原则上测量的变化,在各向异性与两个高精度的测量相隔一个世纪。

英文摘要:

The expansion of the universe may be observed in ``realtime'' by measuring changes in the patterns of the anisotropy in the CMB. As the universe ages, the surface of decoupling--or the CMB photosphere--moves away from us and samples a different gravitational landscape. The response of the CMB to this new landscape results in a different pattern than we observe today. The largest change occurs at l~900. We show that with an array of detectors that we may envision having in a couple of decades, one can in principle measure the change in the anisotropy with two high precision measurements separated by a century.

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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