论文标题
部分可观测时空混沌系统的无模型预测
CMB lensing from Planck PR4 maps
论文作者
论文摘要
我们在最新的Planck CMB PR4（NPIPE）映射上重建宇宙微波背景（CMB）镜头电位，该映射的数据比2018 PR3发布略多，并使用更最佳的滤波来实现二次估计器。我们将重建信号提高到噪声近20美元\％$，从而限制了Planck 2018最佳拟合单位CMB-Marigalized镜头镜头功率谱的幅度，至$ 1.004 \ pm 0.024 $（$ 68 \％$ limits），这是对CMB Lensing Power Spectrum的最严格的约束。对于基本$λ$ CDM宇宙学，我们发现$σ_8Ω_m^{0.25} = 0.599 \ pm 0.016 $从CMB镜头单独使用，结合了弱先验和元素丰度观察。与Baryon声学振荡数据的组合给个人$ 68 \％$ $ cdm参数$ 68 \％$约束，$σ_8= 0.814 \ pm 0.016 $，$ h_0 = 68.1^{+1.0} {+1.0} _ { - 1.1} 0.313^{+0.014} _ { - 0.016} $。仅普朗克两极分化地图现在就将镜头功率限制在$ 7 \％$。
We reconstruct the Cosmic Microwave Background (CMB) lensing potential on the latest Planck CMB PR4 (NPIPE) maps, which include slightly more data than the 2018 PR3 release, and implement quadratic estimators using more optimal filtering. We increase the reconstruction signal to noise by almost $20\%$, constraining the amplitude of the CMB-marginalized lensing power spectrum in units of the Planck 2018 best-fit to $1.004 \pm 0.024$ ($68\%$ limits), which is the tightest constraint on the CMB lensing power spectrum to date. For a base $Λ$CDM cosmology we find $σ_8 Ω_m^{0.25} = 0.599\pm 0.016$ from CMB lensing alone in combination with weak priors and element abundance observations. Combination with baryon acoustic oscillation data gives tight $68\%$ constraints on individual $Λ$CDM parameters $σ_8 = 0.814\pm 0.016$, $H_0 = 68.1^{+1.0}_{-1.1}$km s$^{-1}$ Mpc$^{-1}$, $Ω_m = 0.313^{+0.014}_{-0.016}$. Planck polarized maps alone now constrain the lensing power to $7\%$.
