论文标题
黑暗能源调查3年结果：扩展对$λ$ CDM的限制，镜头和星系群集
Dark Energy Survey Year 3 Results: Constraints on extensions to $Λ$CDM with weak lensing and galaxy clustering
论文作者
论文摘要
我们使用Dark Energy调查的前三年观察结果和外部数据的测量结果将扩展限制为$λ$ CDM模型。 DES数据是弱重力透镜，星系聚类及其互相关的两点相关函数。我们使用模拟数据和对真实数据的盲目分析来验证结果的鲁棒性。在许多情况下，约束功率受到我们所需精度可靠的非线性预测的限制。这些模型是：具有时间依赖的状态方程，非零空间曲率，无菌中微子，重力物理学的修饰以及bined $σ_8（z）$模型，可作为结构生长的探针。对于在枢轴红移评估的状态的时间变化的暗能式方程，我们发现$（w _ {\ rm p}，w_a），w_a）=（-0.99^{+0.28} _ { - 0.17}， - 0.9 \ 0.9 \ pm 1.2 \ pm 1.2 \ pm 1.2 \ pm 1.2，均为68％的信心，une $ z _ = 0.24 $ p} $（w _ {\ rm p}，w_a）=（-1.03^{+0.04} _ { - 0.03}， - 0.4^{+0.4} _ { - 0.3}）$，带有$ z _ {\ rm p} = 0.21 $，用于所有数据的组合。 $ω_k= 0.0009 \ pm 0.0017 $和有效相对论物种$ n _ {\ rm eff} = 3.10^{+0.15} _ { - 0.16} $以外部数据为主。对于大量的无菌中微子，与以前的分析相比，我们改善了质量$ m _ {\ rm eff} $的上部限制，比以前的分析提高了三倍，$ 95％的限制为$（Δn_{\ rm eff}，m _ {\ rm eff}） We also constrain changes to the lensing and Poisson equations controlled by functions $Σ(k,z) = Σ_0 Ω_Λ(z)/Ω_{Λ,0}$ and $μ(k,z)=μ_0 Ω_Λ(z)/Ω_{Λ,0}$ respectively to $Σ_0=0.6^{+0.4}_{-0.5}$ from单独使用$（σ_0，μ_0）=（0.04 \ pm 0.05,0.08^{+0.21} _ { - 0.19}）$用于所有数据的组合。总体而言，我们没有发现超过$λ$ CDM的物理学的重要证据。
We constrain extensions to the $Λ$CDM model using measurements from the Dark Energy Survey's first three years of observations and external data. The DES data are the two-point correlation functions of weak gravitational lensing, galaxy clustering, and their cross-correlation. We use simulated data and blind analyses of real data to validate the robustness of our results. In many cases, constraining power is limited by the absence of nonlinear predictions that are reliable at our required precision. The models are: dark energy with a time-dependent equation of state, non-zero spatial curvature, sterile neutrinos, modifications of gravitational physics, and a binned $σ_8(z)$ model which serves as a probe of structure growth. For the time-varying dark energy equation of state evaluated at the pivot redshift we find $(w_{\rm p}, w_a)= (-0.99^{+0.28}_{-0.17},-0.9\pm 1.2)$ at 68% confidence with $z_{\rm p}=0.24$ from the DES measurements alone, and $(w_{\rm p}, w_a)= (-1.03^{+0.04}_{-0.03},-0.4^{+0.4}_{-0.3})$ with $z_{\rm p}=0.21$ for the combination of all data considered. Curvature constraints of $Ω_k=0.0009\pm 0.0017$ and effective relativistic species $N_{\rm eff}=3.10^{+0.15}_{-0.16}$ are dominated by external data. For massive sterile neutrinos, we improve the upper bound on the mass $m_{\rm eff}$ by a factor of three compared to previous analyses, giving 95% limits of $(ΔN_{\rm eff},m_{\rm eff})\leq (0.28, 0.20\, {\rm eV})$. We also constrain changes to the lensing and Poisson equations controlled by functions $Σ(k,z) = Σ_0 Ω_Λ(z)/Ω_{Λ,0}$ and $μ(k,z)=μ_0 Ω_Λ(z)/Ω_{Λ,0}$ respectively to $Σ_0=0.6^{+0.4}_{-0.5}$ from DES alone and $(Σ_0,μ_0)=(0.04\pm 0.05,0.08^{+0.21}_{-0.19})$ for the combination of all data. Overall, we find no significant evidence for physics beyond $Λ$CDM.
