发表机构
University of Portsmouth（朴茨茅斯大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文利用红矮星的质量-半径测量检验牛顿引力常数近期快速跃变的假设，发现解决哈勃张力的G步进模型被显著排除，分别达到3.1σ和4.0σ的置信水平。
AI 中文摘要
我们检验了牛顿引力常数在大约73至1.3亿年前发生快速跃变的假设，该假设被提出来作为哈勃张力的一些解决方案。质量低于约0.35倍太阳质量的完全对流红矮星，其热时标与所提出的跃变回溯时间相当，因此可以保留可观的现今记忆。我们证明，G的快速阶跃会引起它们半径的可测量变化，并将这些预测与分离食双星中八颗红矮星的质量-半径测量结果进行对比。我们发现，为解决哈勃张力而提出的G步进模型（对应回溯时间73百万年时G变化4%，以及回溯时间130百万年时G变化11%）分别以3.1σ和4.0σ的显著性被排除。
英文摘要
We test the hypothesis that Newton's gravitational constant underwent a rapid transition approximately $73$-$130\,{\rm Myr}$ ago, as proposed in some resolutions of the Hubble tension. Fully convective red dwarf stars with masses below $\sim0.35\,M_\odot$ have thermal timescales comparable to the proposed transition look-back times, so an appreciable present-day memory can remain. We show that a rapid step in $G$ induces measurable changes in their radii and confront these predictions with mass-radius measurements of eight red dwarfs in detached eclipsing binaries. We find that the $G$-step models proposed to resolve the Hubble tension, corresponding to a $4\%$ change in $G$ at a look-back time of $73\,{\rm Myr}$ and an $11\%$ change at $130\,{\rm Myr}$, are excluded at significances of $3.1σ$ and $4.0σ$, respectively.
Comments9 pages, three figures, one table
