论文标题
Eboss类星体功率谱的宇宙学限制
Cosmological constraints from the power spectrum of eBOSS quasars
论文作者
论文摘要
我们在有效的红移$ z _ {\ rm eff} = 1.48 $上介绍了eBoss类星体各向异性功率谱的基于有效场理论（EFT）的宇宙学全形分析。我们对模拟的管道进行了广泛的测试，特别注意观察系统的建模，例如红移涂抹，光纤碰撞和径向积分的约束。 Assuming the minimal $Λ$CDM model, and fixing the primordial power spectrum tilt and the physical baryon density, we find the Hubble constant $H_0=(66.7\pm 3.2)~$km~s$^{-1}$Mpc$^{-1}$, the matter density fraction $Ω_m=0.32\pm 0.03$, and the late-time mass fluctuation振幅$σ_8= 0.95 \ pm 0.08 $。这些测量与普朗克宇宙微波背景结果完全一致。我们的Eboss Quasar $ S_8 $后部，$ 0.98 \ pm0.11 $，没有表现出所谓的$ s_8 $张力。我们的工作为从DESI等未来调查中对类星体样本进行系统的全面分析铺平了道路。
We present the effective-field theory (EFT)-based cosmological full-shape analysis of the anisotropic power spectrum of eBOSS quasars at the effective redshift $z_{\rm eff}=1.48$. We perform extensive tests of our pipeline on simulations, paying a particular attention to the modeling of observational systematics, such as redshift smearing, fiber collisions, and the radial integral constraint. Assuming the minimal $Λ$CDM model, and fixing the primordial power spectrum tilt and the physical baryon density, we find the Hubble constant $H_0=(66.7\pm 3.2)~$km~s$^{-1}$Mpc$^{-1}$, the matter density fraction $Ω_m=0.32\pm 0.03$, and the late-time mass fluctuation amplitude $σ_8=0.95\pm 0.08$. These measurements are fully consistent with the Planck cosmic microwave background results. Our eBOSS quasar $S_8$ posterior, $0.98\pm0.11$, does not exhibit the so-called $S_8$ tension. Our work paves the way for systematic full-shape analyses of quasar samples from future surveys like DESI.
