论文标题
Planck，SPT和ACT数据的早期暗能量的提示：新物理或系统学？
Hints of Early Dark Energy in Planck, SPT, and ACT data: new physics or systematics?
论文作者
论文摘要
我们使用ACT DR4，SPT-3G 2018，Planck极化和受限的Planck温度数据（$ \ ell <650 $）调查了对早期暗能量（EDE）的限制，发现Ede比$λ$ CDM的Ede相比，为Ede的Ede提供了3美元的$3.3σ$ preferperion（$3.3σ$ preference（$Δχ^2 = -16.2 $）。 EDE贡献了$ f _ {\ rm ede}（z_c）= 0.163^{+0.047} _ { - 0.04} $的最大分数能量密度$ h_0 = 74.2^{+1.9} _ { - 2.1} $ km/s/mpc。我们发现Planck和ACT DR4数据提供了$χ^2 $的大部分改进，而SPT-3G的包含将$ f _ {\ rm eDe}（z_c）$的后部从$λ$ CDM中移开。这是首次报道了这三个组合的CMB数据集对EDE的中等偏好。我们发现，包括对超新星光度距离的测量和Baryon声学振荡标准标准统治者仅对偏好的影响（$3.0σ$），而测量的测量值探测了近期物质的群集 - 镜头镜头的潜在功率谱从Planck和Planck和$ fσ_8$从BOSS中降低了prexceance of the PrevECECE的偏好$ 2.6 $ 2.6 $ 2.6 $ 2.6 $。相反，SH0ES协作报告的$ H_0 $值上的先验将偏好提高到$4-5σ$级别。在没有此事的情况下，以$ \ ell> 1300 $包含Planck TT数据将偏好从$3.0σ$减少到$2.3σ$，并且对$ f _ {\ rm eDe}（z_c）$的约束变得与$λ$ CDM兼容。我们探讨了普朗克极化数据中的系统错误是否可能影响我们的结论，并发现改变TE极化效率会大大降低Planck对EDE的偏好。为了确定仅在CMB数据中的EDE提示是否是系统错误的唯一结果还是开放新物理学的唯一结果，将需要做更多的工作。
We investigate constraints on early dark energy (EDE) using ACT DR4, SPT-3G 2018, Planck polarization, and restricted Planck temperature data (at $\ell<650$), finding a $3.3σ$ preference ($Δχ^2=-16.2$ for 3 additional degrees of freedom) for EDE over $Λ$CDM. The EDE contributes a maximum fractional energy density of $f_{\rm EDE}(z_c)=0.163^{+0.047}_{-0.04}$ at a redshift $z_c=3357\pm200$ and leads to a CMB inferred value of the Hubble constant $H_0=74.2^{+1.9}_{-2.1}$ km/s/Mpc. We find that Planck and ACT DR4 data provide the majority of the improvement in $χ^2$, and that the inclusion of SPT-3G pulls the posterior of $f_{\rm EDE}(z_c)$ away from $Λ$CDM. This is the first time that a moderate preference for EDE has been reported for these three combined CMB data sets. We find that including measurements of supernovae luminosity distances and the baryon acoustic oscillation standard ruler only minimally affects the preference ($3.0σ$), while measurements that probe the clustering of matter at late times - the lensing potential power spectrum from Planck and $f σ_8$ from BOSS - decrease the significance of the preference to 2.6$σ$. Conversely, adding a prior on the $H_0$ value as reported by the SH0ES collaboration increases the preference to the $4-5σ$ level. In the absence of this prior, the inclusion of Planck TT data at $\ell>1300$ reduces the preference from $3.0σ$ to $2.3σ$ and the constraint on $f_{\rm EDE}(z_c)$ becomes compatible with $Λ$CDM at $1σ$. We explore whether systematic errors in the Planck polarization data may affect our conclusions and find that changing the TE polarization efficiencies significantly reduces the Planck preference for EDE. More work will be necessary to establish whether these hints for EDE within CMB data alone are the sole results of systematic errors or an opening to new physics.
