arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.09729astro-ph.COgr-qchep-th
收藏

根据最近的宇宙学数据看哈勃张力对原始宇宙的影响

Implication of the Hubble tension for the primordial Universe in light of recent cosmological data

Gen Ye, Bin Hu, Yun-Song Piao

摘要:

在哈勃张力的预复合分辨率中,例如早期暗能量,复合前的新物理改变了相关宇宙学参数的值,使得模型可以像$Λ$ CDM一样与宇宙微波背景和重子声学振荡观测相拟合。本文通过对Planck 2018 +BAO+Pantheon+R19+Keck Array/BICEP数据集进行蒙特卡罗马尔可夫链分析,阐明了参数漂移与$δH_0$的关系,特别是发现原始标量谱指数尺度的漂移为${δn_s}\simeq 0.4{δH_0\over H_0}$。我们的结果的一个新的观点是,如果目前的$H_0$本地测量是正确的,哈勃张力的完整分辨率似乎指向一个标度不变的哈里森-Zeldovich频谱,即$n_s= 1$为$H_0\sim 73$ km/s/Mpc。

英文摘要:

In prerecombination resolutions of the Hubble tension, such as early dark energy, new physics before recombination shifts the values of relevant cosmological parameters so that the models can fit with cosmic microwave background and baryon acoustic oscillations observations as well as $Λ$CDM does. In this paper, we clarify how the parameter shifts are related with $δH_0$, particularly we find the shift of primordial scalar spectral index scales as ${δn_s}\simeq 0.4{δH_0\over H_0}$ by performing the Monte Carlo Markov chain analysis with the Planck2018+BAO+Pantheon+R19+Keck Array/BICEP dataset. A novel point of our result is that if the current $H_0$ measured locally is correct, complete resolution of the Hubble tension seems to be pointing to a scale invariant Harrison-Zeldovich spectrum, i.e. $n_s= 1$ for $H_0\sim 73$km/s/Mpc.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑