$H_0$ Ex Machina:真空变形和超越$H_0$
$H_0$ Ex Machina: Vacuum Metamorphosis and Beyond $H_0$
摘要:
我们没有用和谐宇宙学来解决张力;我们确实从我们模型中的CMB+BAO+SN数据中获得了$H_0\approx 74\,$ km/s/Mpc,但这不是重点。不应孤立地看待由各种天体物理探测器获得的哈勃常数值的差异。虽然人们可以通过膨胀率的早期时间转变或晚期时间转变来解决至少一些差异,但这些引入了其他变化。我们提倡一种整体的方法,使用各种各样的宇宙数据,而不是专注于一个数字,$H_0$。真空变态是一种由量子引力效应物理激发的晚期跃迁,具有与\lcdm相同的参数数量,可以成功地从宇宙微波背景数据中给出高的$H_0$值,但当与多个距离探测器结合时会失败。我们还探讨了空间曲率的影响,以及宇宙膨胀和增长的联合分析。
英文摘要:
We do not solve tensions with concordance cosmology; we do obtain $H_0\approx 74\,$km/s/Mpc from CMB+BAO+SN data in our model, but that is not the point. Discrepancies in Hubble constant values obtained by various astrophysical probes should not be viewed in isolation. While one can resolve at least some of the differences through either an early time transition or late time transition in the expansion rate, these introduce other changes. We advocate a holistic approach, using a wide variety of cosmic data, rather than focusing on one number, $H_0$. Vacuum metamorphosis, a late time transition physically motivated by quantum gravitational effects and with the same number of parameters as \lcdm, can successfully give a high $H_0$ value from cosmic microwave background data but fails when combined with multiple distance probes. We also explore the influence of spatial curvature, and of a conjoined analysis of cosmic expansion and growth.
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