论文标题
八个时间播放星系镜头的哈勃常数
The Hubble constant from eight time-delay galaxy lenses
论文作者
论文摘要
我们从关节对8个强烈，四倍的镜头系统的自由形式分析中确定了哈勃常数。在一致性宇宙学中，我们发现$ h_0 = 71.8^{+3.9} _ { - 3.3} \，\ Mathrm {km} \，\ Mathrm {s}^{ - 1}^{ - 1} { - 1} \，\ Mathrm {mpc}^{mpc}^{ - 1}这与宇宙微波背景的Supernovae类型IA和Planck观测值的最新测量相一致。与这些和其他最近的时间录像的确定相比，我们的精度较低，因为我们的建模策略反映了镜头变性的系统不确定性。此外，我们能够通过从本地和早期宇宙测量值限制为$ H_0 $的任何一个值来找到合理的镜头图像重建。这使我们得出结论，$ H_0 $的当前镜头限制不足以打破宇宙学的“哈勃张力”问题。
We present a determination of the Hubble constant from the joint, free-form analysis of 8 strongly, quadruply lensing systems. In the concordance cosmology, we find $H_0 = 71.8^{+3.9}_{-3.3}\,\mathrm{km}\,\mathrm{s}^{-1}\,\mathrm{Mpc}^{-1}$ with a precision of $4.97\%$. This is in agreement with the latest measurements from Supernovae Type Ia and Planck observations of the cosmic microwave background. Our precision is lower compared to these and other recent time-delay cosmography determinations, because our modelling strategies reflect the systematic uncertainties of lensing degeneracies. We furthermore are able to find reasonable lensed image reconstructions by constraining to either value of $H_0$ from local and early Universe measurements. This leads us to conclude that current lensing constraints on $H_0$ are not strong enough to break the "Hubble tension" problem of cosmology.
