论文标题

当前的大规模结构数据不排除早期的黑暗能量

Early dark energy is not excluded by current large-scale structure data

论文作者

Smith, Tristan L., Poulin, Vivian, Bernal, José Luis, Boddy, Kimberly K., Kamionkowski, Marc, Murgia, Riccardo

论文摘要

我们使用Boss Galaxy Power Spectra对早期暗能量(EDE)对星系聚类的影响进行了研究,并使用大规模结构(LSS)的有效田间理论(EFT)和来自Planck的宇宙微波背景(CMB)的各向异性进行了分析。最近的研究发现,这些数据对宇宙中允许的EDE的最大丰度施加了严格的限制。我们在这里认为,他们的结论是他们在EDE参数空间上选择先验的结果,而不是数据和模型之间的任何分歧。例如,在考虑EFT-LS,CMB和高红移超新星数据时,我们发现EDE和$λ$ CDM型号可以提供统计上不可区分的拟合($Δχ^2 = 0.12 $),具有相对较大的eDe的能量密度的相对较大的价值($ f _ f _ $ f _ {$ rm eDe($ fble),并且( EDE模型中的71 $ km/s/mpc)。此外,我们证明了从包含EFT-LSS跟踪的约束功率到功率光谱振幅之间的潜在张力$ a_s $之间的潜在张力,即使在$λ$ CDM的背景下也会出现。在更好地理解这一点之前,在将EFT-Boss+Planck约束对$λ$ CDM的模型解释时,应谨慎行事。这些发现表明,EDE仍然为哈勃张力提供了潜在的解决方案,并且值得通过未来的数据集测试EDE的预测并进一步研究其理论可能性。

We revisit the impact of early dark energy (EDE) on galaxy clustering using BOSS galaxy power spectra, analyzed using the effective field theory (EFT) of large-scale structure (LSS), and anisotropies of the cosmic microwave background (CMB) from Planck. Recent studies found that these data place stringent constraints on the maximum abundance of EDE allowed in the Universe. We argue here that their conclusions are a consequence of their choice of priors on the EDE parameter space, rather than any disagreement between the data and the model. For example, when considering EFT-LSS, CMB, and high-redshift supernovae data we find the EDE and $Λ$CDM models can provide statistically indistinguishable fits ($Δχ^2 = 0.12$) with a relatively large value for the maximum fraction of energy density in the EDE ($f_{\rm ede} = 0.09$) and Hubble constant ($H_0 = 71$ km/s/Mpc) in the EDE model. Moreover, we demonstrate that the constraining power added from the inclusion of EFT-LSS traces to the potential tension between the power-spectrum amplitudes $A_s$ derived from BOSS and from Planck that arises even within the context of $Λ$CDM. Until this is better understood, caution should be used when interpreting EFT-BOSS+Planck constraints to models beyond $Λ$CDM. These findings suggest that EDE still provides a potential resolution to the Hubble tension and that it is worthwhile to test the predictions of EDE with future data-sets and further study its theoretical possibilities.

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