arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.13976astro-ph.COgr-qc
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宇宙学观测对牛顿常数的限制

Constraints on Newton's Constant from Cosmological Observations

Ke Wang, Lu Chen

摘要:

牛顿常数对超新星的CMB功率谱和光变曲线都有观测影响。我们用Planck数据、BAO数据和SNIa测量来约束CMB时期牛顿常数$G$的变化和PANTHEON样品的红移范围,没有发现$G$随红移变化的证据。通过引入一个自由参数$G$扩展$Λ$ CDM模型,得到了68 $\%$ C. L.处的$G =(6.65635_{-0.18560}^{+0.18766} ) \times 10^{-11} \rm m^3kg^{-1}s^{-2}$和$H_0=67.62^{+1.24}_{-1.25} $ km s $^{-1}$ Mpc $^{-1}$.来自普朗克$+$ BAO $+$未校准的万神殿。结果表明,$G$的值与CODATA 2018一致,但无法通过这种方式求解$H_0$张力。

英文摘要:

Newton's constant has observational effects on both the CMB power spectra and the light curves of SNIa. We use Planck data, BAO data and the SNIa measurement to constrain the varying Newton's constant $G$ during the CMB epoch and the redshift ranges of PANTHEON samples, and find no evidence indicating that $G$ is varying with redshift. By extending the $Λ$CDM model with one free parameter $G$, we get $G =(6.65635_{-0.18560}^{+0.18766} ) \times 10^{-11} \rm m^3kg^{-1}s^{-2}$ and $H_0=67.62^{+1.24}_{-1.25} $ km s$^{-1}$ Mpc$^{-1}$ at 68$\%$ C.L. from Planck$+$BAO$+$uncalibrated PANTHEON. The results show the value of $G$ is consistent with CODATA 2018, but the $H_0$ tension can't be solved in this way.

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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