论文标题
测试具有大规模结构的低红移宇宙加速度
Testing Low-Redshift Cosmic Acceleration with Large-Scale Structure
论文作者
论文摘要
我们研究了红移$ z = 0.57 $与Baryon声学振荡（BAO）数据的测量值（BAO）数据的宇宙学意义，$ 0.1 <z <z <2.4 $。我们发现，仅这些数据的深色能量在$>10σ$中的延迟加速度的直接证据，而与宇宙微波背景和超新星无关。在$ω_bh^2 $上使用核合成之前，我们测量哈勃常数为$ h_0 = 72.3 \ pm1.9 \; {\ rm km \，s}^{ - 1} { - 1} {\ rm mpc} $ h_0 = 69.0 \ pm1.2 \; {\ rm km \，s}^{ - 1} {\ rm mpc}^{ - 1} $均在$ z = 2.34 $的$ z = 2.34 $时，均独立于cmb。在CMB，BAO和超新星数据中添加空隙可大大改善对状态的暗能量方程的测量，从而使功绩的数字提高> 40％，但与Flat Flat flat $λ$ Cold Dark Matter保持一致。
We examine the cosmological implications of measurements of the void-galaxy cross-correlation at redshift $z=0.57$ combined with baryon acoustic oscillation (BAO) data at $0.1<z<2.4$. We find direct evidence of the late-time acceleration due to dark energy at $>10σ$ significance from these data alone, independent of the cosmic microwave background and supernovae. Using a nucleosynthesis prior on $Ω_bh^2$, we measure the Hubble constant to be $H_0=72.3\pm1.9\;{\rm km\,s}^{-1}{\rm Mpc}^{-1}$ from BAO+voids at $z<2$, and $H_0=69.0\pm1.2\;{\rm km\,s}^{-1}{\rm Mpc}^{-1}$ when adding Lyman-$α$ BAO at $z=2.34$, both independent of the CMB. Adding voids to CMB, BAO and supernova data greatly improves measurement of the dark energy equation of state, increasing the figure of merit by >40%, but remaining consistent with flat flat $Λ$ cold dark matter.
