论文标题
完成的SDSS-IV扩展Baryon振荡光谱调查：来自红移0.8和2.2之间的类星体样品的各向异性功率谱的BAO和RSD测量
The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: BAO and RSD measurements from the anisotropic power spectrum of the Quasar sample between redshift 0.8 and 2.2
论文作者
论文摘要
我们测量EBOSS最终数据发布（DR16）的类星体的聚类。该样本包含$ 343 \，708 $ quasars redshifts $ 0.8 \ leq z \ leq z \ leq2.2 $超过$ 4699 \，\ mathrm {deg}^2 $。我们在有效的红移$ z {\ rm eff} = 1.480 $的情况下计算各向异性功率谱的Legendre多尔（0,2,4），并执行BAO和BAO和全形分析（FS）。这些错误包括系统错误，构成统计错误的1/3。系统的错误包括使用盲n体模拟挑战和观察效应研究的建模部分，并使用近似模型研究，以说明各种类型的红移涂抹和光纤碰撞。对于BAO分析，我们测量横向共同距离$ d _ {\ rm m}（z _ {\ rm eff}）/r _ {\ rm drag} = 30.60 \ pm {0.90} $和hubble demand and the hubble $ d _ {\ rm h} {\ rm h} {\ rm fefm drag} = 13.34 \ pm {0.60} $。这与配置空间分析相一致，共识产生：$ d _ {\ rm m}（z _ {\ rm eff}）/r _ {\ rm drag} = 30.69 \ pm {0.80} $ drag} = 13.26 \ pm {0.55} $。在FS分析中，我们使用基于正则扰动理论的模型拟合功率谱，其中包括红移空间扭曲和Alcock-Paczynski效应。结果为$ d _ {\ rm m}（z _ {\ rm eff}）/r _ {\ rm drag} = 30.68 \ pm {0.90} $和$ d _ {\ rm h}约束结构的线性增长率$ f（z _ {\ rm eff}）σ_8（z _ {\ rm eff}）= 0.476 \ pm {0.047} $。我们的结果与配置空间分析一致。 Eboss Quasar样本的共识分析产生：$ d _ {\ rm m}（z _ {\ rm eff}）/r _ {\ rm drag} = 30.21 \ pm {0.79} $，$ d _ {\ rm H}（\ rm H}（z _ _ _ { drag} = 3.23 \ pm {0.47} $和$ f（z _ {\ rm eff}）σ_8（z _ {\ rm eff}）= 0.462 \ pm {0.045} $，并且与flat $λ{\ rm cdm cosmologic型模型相符，并且与plancological模型相关。
We measure the clustering of quasars of the final data release (DR16) of eBOSS. The sample contains $343\,708$ quasars between redshifts $0.8\leq z\leq2.2$ over $4699\,\mathrm{deg}^2$. We calculate the Legendre multipoles (0,2,4) of the anisotropic power spectrum and perform a BAO and a Full-Shape (FS) analysis at the effective redshift $z{\rm eff}=1.480$. The errors include systematic errors that amount to 1/3 of the statistical error. The systematic errors comprise a modelling part studied using a blind N-Body mock challenge and observational effects studied with approximate mocks to account for various types of redshift smearing and fibre collisions. For the BAO analysis, we measure the transverse comoving distance $D_{\rm M}(z_{\rm eff})/r_{\rm drag}=30.60\pm{0.90}$ and the Hubble distance $D_{\rm H}(z_{\rm eff})/r_{\rm drag}=13.34\pm{0.60}$. This agrees with the configuration space analysis, and the consensus yields: $D_{\rm M}(z_{\rm eff})/r_{\rm drag}=30.69\pm{0.80}$ and $D_{\rm H}(z_{\rm eff})/r_{\rm drag}=13.26\pm{0.55}$. In the FS analysis, we fit the power spectrum using a model based on Regularised Perturbation Theory, which includes Redshift Space Distortions and the Alcock-Paczynski effect. The results are $D_{\rm M}(z_{\rm eff})/r_{\rm drag}=30.68\pm{0.90}$ and $D_{\rm H}(z_{\rm eff})/r_{\rm drag}=13.52\pm{0.51}$ and we constrain the linear growth rate of structure $f(z_{\rm eff})σ_8(z_{\rm eff})=0.476\pm{0.047}$. Our results agree with the configuration space analysis. The consensus analysis of the eBOSS quasar sample yields: $D_{\rm M}(z_{\rm eff})/r_{\rm drag}=30.21\pm{0.79}$, $D_{\rm H}(z_{\rm eff})/r_{\rm drag}=3.23\pm{0.47}$ and $f(z_{\rm eff})σ_8(z_{\rm eff})=0.462\pm{0.045}$ and is consistent with a flat $Λ{\rm CDM}$ cosmological model using Planck results.
