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arXiv 2212.04494astro-ph.CO
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通过修改宇宙复合过程解决哈勃张力需要什么条件

What it takes to solve the Hubble tension through modifications of cosmological recombination

Nanoom Lee, Yacine Ali-Haïmoud, Nils Schöneberg, Vivian Poulin

AI总结:

本文利用 Fisher 偏置方法研究对 ΛCDM 复合过程的微扰修改,发现其可在 Planck CMB 数据下缓解哈勃张力并降低 S8,但加入 BAO 与未标定超新星数据后无法完全解决。

摘要:

我们利用 Fisher 偏置形式体系,构建了针对哈勃张力的数据驱动解决方案,这些方案是对基准 ΛCDM 宇宙学的微扰修改。以随时间变化的电子质量和精细结构常数作为原理验证,并首先聚焦于 Planck CMB 数据,我们证明修改后的复合过程能够解决哈勃张力,并降低 S8 以匹配弱引力透镜测量。然而,一旦将重子声学振荡和未标定超新星数据纳入分析,仅凭对复合过程的微扰修改便无法完全解决该张力。

英文摘要:

We construct data-driven solutions to the Hubble tension which are perturbative modifications to the fiducial $Λ$CDM cosmology, using the Fisher bias formalism. Taking as proof of principle the case of a time-varying electron mass and fine structure constant, and focusing first on Planck CMB data, we demonstrate that a modified recombination can solve the Hubble tension and lower $S_8$ to match weak lensing measurements. Once baryonic acoustic oscillation and uncalibrated supernovae data are included, however, it is not possible to fully solve the tension with perturbative modifications to recombination.

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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