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arXiv 1008.2695astro-ph.CO
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从宇宙切变的红移演化约束宇宙的膨胀历史

Constraining the expansion history of the universe from the red shift evolution of cosmic shear

Daniel Levy, Ram Brustein

摘要:

我们提出了一个定量分析的约束条件的总状态方程参数,可以得到从测量宇宙剪切的红移演化。我们比较的约束,可以从测量的自旋两个角多极矩的宇宙剪切的宇宙剪切的二维和三维功率谱所产生的。我们发现,如果宇宙剪切的多极矩测量足够准确的几个红移的约束条件下的暗能量状态方程参数显着改善相比,可以从其他测量。

英文摘要:

We present a quantitative analysis of the constraints on the total equation of state parameter that can be obtained from measuring the red shift evolution of the cosmic shear. We compare the constraints that can be obtained from measurements of the spin two angular multipole moments of the cosmic shear to those resulting from the two dimensional and three dimensional power spectra of the cosmic shear. We find that if the multipole moments of the cosmic shear are measured accurately enough for a few red shifts the constraints on the dark energy equation of state parameter improve significantly compared to those that can be obtained from other measurements.

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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