论文标题
完成的SDSS-IV扩展BARYON振荡光谱调查：Baryon声学振荡与Lyman-$ lyman-$α$ Forests
The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Baryon acoustic oscillations with Lyman-$α$ forests
论文作者
论文摘要
我们使用完整的红移$ Z = 2.33 $使用完整的扩展Baryonic振荡光谱调查（Eboss），以有效的红移$ Z = 2.33 $进行了从Lyman-$ $ $ $ $ $ $α$（ly $α$）吸收的重型声振荡（BAO）的测量。第十六个也是最后一次EBOSS数据发布（SDSS DR16）包含来自Eboss及其前身Baryonic振荡光谱调查（BOSS）的所有数据，提供了210,005美元的$ Z_ {Q}> 2.10美元的$ 210,005 $ Quasars，用于衡量LY $α$α$吸收。我们在LY $α$吸收的自动相关以及与$ 341,468 $ Quasars的跨相关性中测量了BAO量表，并与红移$ z_ {q}> 1.77 $相关。除了从新的类星体和更深入的观察中获得的统计增长外，对先前工作的主要改进来自对物理和工具相关性的更准确的建模以及使用新的模拟数据集的使用。从自动和互相关组合的BAO测量结果得出了两个比率的约束$ d_ {h}（z = 2.33）/r_ {d} = 8.99 \ pm 0.19 $和$ d_ {m} $ and $ d_ {m}（m}（z = 2.33）/r_ {d} = 37.5.5 = 37.5 \ pm 1.1 $ 1.1 $ 1.1 $ 1.1 $ 1.1 $ 1.1 $ 1.1 $ 1.1 $ 1.1 $ 1.1 $ 1.1 $ 1.1。这些结果在Planck〜（2016）的Flat-$λ$ CDM宇宙学预测的$1.5σ$之内。分析代码，\ texttt {picca}，通量传输字段测量的目录以及$Δχ^{2} $表面。
We present a measurement of baryonic acoustic oscillations (BAO) from Lyman-$α$ (Ly$α$) absorption and quasars at an effective redshift $z=2.33$ using the complete extended Baryonic Oscillation Spectroscopic Survey (eBOSS). The sixteenth and final eBOSS data release (SDSS DR16) contains all data from eBOSS and its predecessor, the Baryonic Oscillation Spectroscopic Survey (BOSS), providing $210,005$ quasars with $z_{q}>2.10$ that are used to measure Ly$α$ absorption. We measure the BAO scale both in the auto-correlation of Ly$α$ absorption and in its cross correlation with $341,468$ quasars with redshift $z_{q}>1.77$. Apart from the statistical gain from new quasars and deeper observations, the main improvements over previous work come from more accurate modeling of physical and instrumental correlations and the use of new sets of mock data. Combining the BAO measurement from the auto- and cross-correlation yields the constraints of the two ratios $D_{H}(z=2.33)/r_{d} = 8.99 \pm 0.19$ and $D_{M}(z=2.33)/r_{d} = 37.5 \pm 1.1$, where the error bars are statistical. These results are within $1.5σ$ of the prediction of the flat-$Λ$CDM cosmology of Planck~(2016). The analysis code, \texttt{picca}, the catalog of the flux-transmission field measurements, and the $Δχ^{2}$ surfaces are publicly available.
