论文标题
kbc void and hubble张力与gpc量表上的$λ$ cdm相矛盾 - $ $ milgromian Dynamics作为可能的解决方案
The KBC void and Hubble tension contradict $Λ$CDM on a Gpc scale $-$ Milgromian dynamics as a possible solution
论文作者
论文摘要
KBC void是一个局部的低强度，观察到的相对密度对比度$δ\ equiv 1 -ρ/ρ_{0} = 0.46 \ pm 0.06 $ 0.06 $在本地组周围的40至300 mpc之间。如果质量在宇宙中保守，那么这样的空白可以解释$5.3σ$哈勃的张力。但是，MXXL模拟表明，KBC空隙会导致$6.04σ$张力，其标准宇宙学（$λ$ CDM）。结合哈勃张力，$λ$ CDM的排除在$7.09σ$的信心中。因此，GPC量表上的密度和速度分布表明重力进行了远距离修改。在这种情况下，我们考虑了一个补充$ 11 \，\ rm {ev}/c^{2} $ sillile netrinos的宇宙学模型。我们解释了为什么这种$ν$ HDM模型具有几乎标准的扩展历史记录，光元素的原始丰度以及宇宙微波背景（CMB）各向异性。在MOND中，结构生长是由周围结构的外部田间自我调节的。我们使用KBC空隙密度曲线，局部哈勃和减速参数限制了我们的模型参数，该参数在红移时从超新星共同得出$ 0.023-0.15 $，在强镜头系统中的时间延迟以及相对于CMB的本地组速度。我们最合适的模型同时以$ 1.14 \％$ $置信度（$ {2.53σ} $张力）以$ {0.055 \，a _ {_ 0}} $的时间独立于$ {0.055 \，a {0.055 \，a {0.055 \，n.0555 \，$ {2.53σ} $张力。因此，我们首次表明KBC空隙可以自然解决Milgromian动力学中的哈勃张力。鉴于许多成功的对星系尺度的先验预测，这些预测很难与$λ$ cdm和$λ$ cdm进行调和，米尔格罗米亚动力学补充了$ 11 \，\ rm {ev}/c^{2} $ siltile netrinos可能会为所有鳞片的天文观察提供更全面的解释。
The KBC void is a local underdensity with the observed relative density contrast $δ\equiv 1 - ρ/ρ_{0} = 0.46 \pm 0.06$ between 40 and 300 Mpc around the Local Group. If mass is conserved in the Universe, such a void could explain the $5.3σ$ Hubble tension. However, the MXXL simulation shows that the KBC void causes $6.04σ$ tension with standard cosmology ($Λ$CDM). Combined with the Hubble tension, $Λ$CDM is ruled out at $7.09σ$ confidence. Consequently, the density and velocity distribution on Gpc scales suggest a long-range modification to gravity. In this context, we consider a cosmological MOND model supplemented with $11 \, \rm{eV}/c^{2}$ sterile neutrinos. We explain why this $ν$HDM model has a nearly standard expansion history, primordial abundances of light elements, and cosmic microwave background (CMB) anisotropies. In MOND, structure growth is self-regulated by external fields from surrounding structures. We constrain our model parameters with the KBC void density profile, the local Hubble and deceleration parameters derived jointly from supernovae at redshifts $0.023 - 0.15$, time delays in strong lensing systems, and the Local Group velocity relative to the CMB. Our best-fitting model simultaneously explains these observables at the $1.14\%$ confidence level (${2.53 σ}$ tension) if the void is embedded in a time-independent external field of ${0.055 \, a_{_0}}$. Thus, we show for the first time that the KBC void can naturally resolve the Hubble tension in Milgromian dynamics. Given the many successful a priori MOND predictions on galaxy scales that are difficult to reconcile with $Λ$CDM, Milgromian dynamics supplemented by $11 \, \rm{eV}/c^{2}$ sterile neutrinos may provide a more holistic explanation for astronomical observations across all scales.
