论文标题
万神殿+分析：宇宙学的约束
The Pantheon+ Analysis: Cosmological Constraints
论文作者
论文摘要
我们对1550个不同类型的IA超新星（SNE IA）的1701光曲线的万神殿+分析对宇宙学参数提出了限制，红移范围从$ z = 0.001 $到2.26。与原始的万神殿分析相比，这项工作的样本量增加，红移跨度增加以及对系统不确定性的改善，并导致宇宙学约束功率有两个改善。对于平面$λ$ CDM型号，我们发现$ω_m= 0.334 \ pm0.018 $仅来自sne ia。对于平面$ W_0 $ CDM型号，我们仅从Sne IA中估计$ W_0 = -0.90 \ pm0.14 $，h $ _0 = 73.5 \ pm1.1 $ km s $ s $^{ - 1} $ mpc $^{ - 1} $，包括Cepheid tessance and tance and tances and copheid hostances and covariance and corvariance（shessees），以及$ w_0 = -0.978^{+0.024} _ { - 0.031} $当将SN可能性与宇宙微波背景（CMB）和Baryon声学振荡的约束结合在一起时（BAO）;两个$ W_0 $值都与宇宙常数一致。我们还介绍了迄今为止最精确的测量结果，该测量值是在平坦的$ W_0W_A $ CDM宇宙中的深色能量的演变，并衡量$ W_A = -0.1^{+ 0.9} _ { - 2.0} $，单独使用，单独使用，h $ _0 = 73.3 \ pm1.1 $ km s $ s $ s $^$^$^$^$^{ - 1} $ W_A = -0.65^{+ 0.28} _ { - 0.32} $将万神殿+与CMB和BAO数据组合时。最后，我们发现，沿距离梯子使用SNE IA的系统不确定性占H $ _0 $的测量中总不确定性的三分之一，并且无法解释当前的局部测量和早期宇宙之间的“哈勃张力”。
We present constraints on cosmological parameters from the Pantheon+ analysis of 1701 light curves of 1550 distinct Type Ia supernovae (SNe Ia) ranging in redshift from $z=0.001$ to 2.26. This work features an increased sample size, increased redshift span, and improved treatment of systematic uncertainties in comparison to the original Pantheon analysis and results in a factor of two improvement in cosmological constraining power. For a Flat$Λ$CDM model, we find $Ω_M=0.334\pm0.018$ from SNe Ia alone. For a Flat$w_0$CDM model, we measure $w_0=-0.90\pm0.14$ from SNe Ia alone, H$_0=73.5\pm1.1$ km s$^{-1}$ Mpc$^{-1}$ when including the Cepheid host distances and covariance (SH0ES), and $w_0=-0.978^{+0.024}_{-0.031}$ when combining the SN likelihood with constraints from the cosmic microwave background (CMB) and baryon acoustic oscillations (BAO); both $w_0$ values are consistent with a cosmological constant. We also present the most precise measurements to date on the evolution of dark energy in a Flat$w_0w_a$CDM universe, and measure $w_a=-0.1^{+0.9}_{-2.0}$ from Pantheon+ alone, H$_0=73.3\pm1.1$ km s$^{-1}$ Mpc$^{-1}$ when including SH0ES, and $w_a=-0.65^{+0.28}_{-0.32}$ when combining Pantheon+ with CMB and BAO data. Finally, we find that systematic uncertainties in the use of SNe Ia along the distance ladder comprise less than one third of the total uncertainty in the measurement of H$_0$ and cannot explain the present "Hubble tension" between local measurements and early-Universe predictions from the cosmological model.
