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arXiv 0912.3683astro-ph.COgr-qchep-phhep-th
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结合CMB和引力波直接探测实验对暴胀的预测约束

Forecast Constraints on Inflation from Combined CMB and Gravitational Wave Direct Detection Experiments

Sachiko Kuroyanagi, Christopher Gordon, Joseph Silk, Naoshi Sugiyama

摘要:

我们研究了如何直接检测的膨胀引力波背景约束膨胀参数和补充CMB偏振测量。用Planck的Fisher信息矩阵方法和直接探测实验BBO(Big Bang Observer)计算的误差椭球显示出不同的参数简并方向,当它们结合时,简并被破坏。对于一个慢滚参数化,我们表明,BBO可以显着改善张量标量比的限制相比,单独普朗克。我们还研究了二次和自然通货膨胀模型。在这两种情况下,如果再加热温度也被视为自由参数,那么添加BBO可以显着改善误差线。在自然暴胀的情况下,我们发现BBO的加入甚至可以部分改善宇宙方差限制的CMB实验的误差条。

英文摘要:

We study how direct detection of the inflationary gravitational wave background constrains inflationary parameters and complements CMB polarization measurements. The error ellipsoids calculated using the Fisher information matrix approach with Planck and the direct detection experiment, BBO (Big Bang Observer), show different directions of parameter degeneracy, and the degeneracy is broken when they are combined. For a slow-roll parameterization, we show that BBO could significantly improve the constraints on the tensor-to-scalar ratio compared with Planck alone. We also look at a quadratic and a natural inflation model. In both cases, if the temperature of reheating is also treated as a free parameter, then the addition of BBO can significantly improve the error bars. In the case of natural inflation, we find that the addition of BBO could even partially improve the error bars of a cosmic variance-limited CMB experiment.

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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