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arXiv 2307.02434astro-ph.CO
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Ia型超新星绝对星等的张力

The tension in the absolute magnitude of Type Ia supernovae

David Camarena, Valerio Marra

备注：
Invited chapter for the edited book Hubble Constant Tension (Eds. E. Di Valentino and D. Brout, Springer Singapore, expected in 2024)
发表信息：
The Hubble Constant Tension, Springer 2024
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AI总结：

本文通过将SH0ES分析扩展至任意宇宙图模型，研究Ia型超新星绝对星等校准中的张力，指出仅修改哈勃流且保持声视界距离与CMB一致的模型无法解释早期与晚期哈勃常数测量差异。

摘要：

本研究旨在阐明哈勃常数（$H_0$）中的张力，$H_0$是宇宙学中代表宇宙膨胀速率的关键指标。来自普朗克卫星任务和SH0ES合作组等独立测量的相互矛盾结果，激发了人们对探索替代宇宙学模型的兴趣。我们将SH0ES的分析扩展到任意宇宙图模型，获得了一个具有竞争力的局部$H_0$测定值，其中一个仅假设标准平坦$Λ$CDM模型（$73.14 \pm 1.10$ km/s/Mpc），另一个仅假设FLRW度规（$74.56 \pm 1.61$ km/s/Mpc）。本研究还强调了超新星星等校准（$M_B$）在宇宙学推断中的重要性，并突出了当超新星分别由CMB和BAO观测或宇宙距离阶梯的前两级进行校准时$M_B$中的张力。这一差异与所涉及的物理过程无关，表明仅改变哈勃流并保持与CMB一致的声视界距离的模型，无法解释早期和晚期$H_0$测量之间的差异。

英文摘要：

This study aims to elucidate the tension in the Hubble constant ($H_0$), a key metric in cosmology representing the universe's expansion rate. Conflicting results from independent measurements such as the Planck satellite mission and the SH0ES collaboration have sparked interest in exploring alternative cosmological models. We extend the analysis by SH0ES to an arbitrary cosmographic model, obtaining a competitive local $H_0$ determination which only assumes the standard flat $Λ$CDM model ($73.14 \pm 1.10$ km/s/Mpc), and another which only assumes the FLRW metric ($74.56 \pm 1.61$ km/s/Mpc). The study also stresses the importance of the supernova magnitude calibration ($M_B$) in cosmological inference and highlights the tension in $M_B$ when supernovae are calibrated either by CMB and BAO observations or the first two rungs of the cosmic distance ladder. This discrepancy, independent of the physics involved, suggests that models solely changing the Hubble flow and maintaining a sound horizon distance consistent with CMB, fail to explain the discrepancy between early- and late-time measurements of $H_0$.

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。

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