arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2010.00513astro-ph.COgr-qchep-th
收藏

天空中的普罗卡

Proca in the sky

Lavinia Heisenberg, Hector Villarrubia-Rojo

摘要:

宇宙学的标准模型,$Λ$ CDM模型,描述了宇宙自大爆炸以来的演化,只有几个参数,基本形式为六个。尽管是最简单的模型,但与早期宇宙测量相比,哈勃常数的直接晚期测量会导致所谓的$H_0$张力。有人声称,当不同的宇宙学探测器结合在一起时,晚时间分辨率注定会失败。在这项工作中,我们用一个非常简单的模型动摇了这一信念。我们展示了如何,在立方矢量Galileon模型的背景下,哈勃张力可以自然地使用CMB,BAO和SNe观测的组合,而不使用任何先验的$H_0$。通过包括对哈勃常数的局部测量,可以进一步减小张力。

英文摘要:

The standard model of cosmology, the $Λ$CDM model, describes the evolution of the Universe since the Big Bang with just a few parameters, six in its basic form. Despite being the simplest model, direct late-time measurements of the Hubble constant compared with the early-universe measurements result in the so-called $H_0$ tension. It is claimed that a late time resolution is predestined to fail when different cosmological probes are combined. In this work, we shake the ground of this belief with a very simple model. We show how, in the context of cubic vector Galileon models, the Hubble tension can naturally be relieved using a combination of CMB, BAO and SNe observations without using any prior on $H_0$ . The tension can be reduced even further by including the local measurement of the Hubble constant.

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。

↑