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arXiv 2407.11263astro-ph.COgr-qchep-th
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演化暗能量对原初引力波搜寻的影响

Impact of evolving dark energy on the search for primordial gravitational waves

Hao Wang, Gen Ye, Yun-Song Piao

AI总结:

该研究探讨演化暗能量对原初引力波搜寻的影响,通过联合多组天文观测数据开展分析,得到张量-标量比的拟合值与非零下限结果,揭示演化暗能量对宇宙参数认知的潜在作用。

摘要:

近期数据似乎显示出对演化暗能量(DE)的偏好。然而,若情况确实如此,且并非由数据中未知的系统误差导致,那么由于一些基本参数的偏移,它可能会以反常的方式影响我们对宇宙的认知。作为示例,我们开展了基于演化暗能量的原初引力波搜寻研究。对最新BICEP/Keck宇宙微波背景(CMB)B模偏振数据与Planck18 CMB、DESI重子声学振荡以及PantheonPlus数据的联合分析显示,最佳拟合的张量-标量比为$r_{0.05}\sim 0.01$,且$r_{0.05}$的下限在$\sim 2\sigma$的置信水平下非零。

英文摘要:

Recent data seem to suggest a preference for the evolving dark energy (DE). However, if the case is actually so, and not caused by unknown systematics in data, it might impact our understanding about our Universe in an anomalous way due to the shifts of some primary parameters. As an example, we present the search for the primordial gravitational waves, based on the evolving DE. The joint analysis of recent BICEP/Keck cosmic microwave background (CMB) B-mode polarization data with Planck18 CMB, DESI baryon acoustic oscillations and PantheonPlus data shows that the bestfit tensor-to-scalar ratio is $r_{0.05}\sim 0.01$, and the lower bound of $r_{0.05}$ is $\sim 2σ$ non-zero.

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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