论文标题
恢复宇宙学与早期的深色能量和大量中微子的一致性？
Restoring cosmological concordance with early dark energy and massive neutrinos?
论文作者
论文摘要
哈勃张力的早期暗能量（EDE）解决方案是以增加聚类幅度为代价，这被认为使对星系聚类数据的拟合度恶化。我们探索释放总中微子质量$m_ν$（可以抑制小规模结构增长）是否可以改善EDE适合银河系聚类。使用Planck Cosmic微波背景和Boss Galaxy聚类数据，贝叶斯分析表明，释放$M_ν$并不能明显增加推断的EDE分数$ f _ {\ rm ede} $：我们找到95％C.L.上限$ f _ {\ rm ede} <0.092 $和$m_ν<0.15 \，{\ rm ev} $。同样，在频繁的配置文件可能性设置（我们的结果支持先前的发现很重要的发现）中，我们发现基线EDE模型（具有$M_ν= 0.06 \，{\ rm ev} $）提供了总体上最佳拟合。例如，与基线EDE相比，具有$m_ν= 0.24 \，{\ rm ev} $保持相同的$ H_0 $（分别为70.08，70.11）的模型，而$ s_8 $ =（0.837，0.837，0.826） $Δχ^2 = 7.5 $。对于所使用的数据集，这些结果不是由聚类幅度驱动的，而是通过对大量中微子引起的后期扩展率进行修改，这使得对BAO量表的测量结果恶化。
The early dark energy (EDE) solution to the Hubble tension comes at the cost of an increased clustering amplitude that has been argued to worsen the fit to galaxy clustering data. We explore whether freeing the total neutrino mass $M_ν$, which can suppress small-scale structure growth, improves EDE's fit to galaxy clustering. Using Planck Cosmic Microwave Background and BOSS galaxy clustering data, a Bayesian analysis shows that freeing $M_ν$ does not appreciably increase the inferred EDE fraction $f_{\rm EDE}$: we find the 95% C.L. upper limits $f_{\rm EDE}<0.092$ and $M_ν<0.15\,{\rm eV}$. Similarly, in a frequentist profile likelihood setting (where our results support previous findings that prior volume effects are important), we find that the baseline EDE model (with $M_ν=0.06\,{\rm eV}$) provides the overall best fit. For instance, compared to baseline EDE, a model with $M_ν=0.24\,{\rm eV}$ maintains the same $H_0$(km/s/Mpc)=(70.08, 70.11, respectively) whilst decreasing $S_8$=(0.837, 0.826) to the $Λ$CDM level, but worsening the fit significantly by $Δχ^2=7.5$. For the datasets used, these results are driven not by the clustering amplitude, but by background modifications to the late-time expansion rate due to massive neutrinos, which worsen the fit to measurements of the BAO scale.
