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arXiv 2104.14481astro-ph.COastro-ph.GAgr-qchep-phhep-th
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Tully-Fisher数据中引力常量跃迁的提示

Hints for a gravitational constant transition in Tully-Fisher data

George Alestas, Ioannis Antoniou, Leandros Perivolaropoulos

摘要:

我们使用一个最新的汇编塔利-费舍尔数据搜索过渡的塔利-费舍尔关系的演变。使用最新的数据汇编,我们发现在$\approx 3σ$水平过渡的关键距离$D_c \simeq 9 Mpc$和$D_c \simeq 17 Mpc$的提示。我们分裂完整的样本在两个子样本根据测量的星系距离相对于分裂距离$D_c$和确定的可能性的最佳拟合的斜率和截距的一个样本相对于最佳拟合的相应值的其他样本。对于$D_c \simeq 9 Mpc$和$D_c \simeq 17 Mpc$,我们发现在$Δχ^2 > 17\; (3.5σ)$水平上两个子样本之间存在张力。使用蒙特卡罗模拟,我们证明了这一结果是强大的随机统计和系统的银河系距离的变化。如果张力被解释为由于引力强度的转变,这将意味着有效的引力常量的移动到较低的值为距离大于$D_c$的$\frac{ΔG}{G}\simeq -0.1$。这样的移动是预期的符号和幅度,但在一定程度上低于最近提出的引力跃迁(红移),以解决哈勃和增长紧张局势($\frac{ΔG}{G}\simeq -0.1$在过渡红移$z_t\lesssim 0.01$($D_c\lesssim 40 Mpc$))。

英文摘要:

We use an up to date compilation of Tully-Fisher data to search for transitions in the evolution of the Tully-Fisher relation. Using an up to date data compilation, we find hints at $\approx 3σ$ level for a transition at critical distances $D_c \simeq 9 Mpc$ and $D_c \simeq 17 Mpc$. We split the full sample in two subsamples according to the measured galaxy distance with respect to a splitting distance $D_c$ and identify the likelihood of the best fit slope and intercept of one sample with respect to the best fit corresponding values of the other sample. For $D_c \simeq 9 Mpc$ and $D_c \simeq 17 Mpc$ we find a tension between the two subsamples at a level of $Δχ^2 > 17\; (3.5σ)$. Using a Monte-Carlo simulation we demonstrate that this result is robust with respect to random statistical and systematic variations of the galactic distances. If the tension is interpreted as due to a gravitational strength transition, it would imply a shift of the effective gravitational constant to lower values for distances larger than $D_c$ by $\frac{ΔG}{G}\simeq -0.1$. Such a shift is of the anticipated sign and magnitude but at somewhat lower distance (redshift) than the gravitational transition recently proposed to address the Hubble and growth tensions ($\frac{ΔG}{G}\simeq -0.1$ at transition redshift $z_t\lesssim 0.01$ ($D_c\lesssim 40 Mpc$)).

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