The structure in the Universe is believed to have evolved from quantum fluctuations seeded by inflation in the early Universe. These fluctuations lead to density perturbations that grow via gravitational instability into large cosmological structures. In the linear regime, the growth of a structure is directly coupled to the velocity field because perturbations are amplified by attracting (and accelerating) matter. Surveys of galaxy redshifts and distances allow one to infer the underlying density and velocity fields. Here, assuming the lambda cold dark matter standard model of cosmology and applying a Hamiltonian Monte Carlo algorithm to the grouped Cosmicflows-4 (CF4) compilation of 38,000 groups of galaxies, the large-scale structure of the Universe is reconstructed out to a redshift corresponding to ~30,000 km s⁻¹. Our method provides a probabilistic assessment of the domains of gravitational potential minima: basins of attraction (BoA). Earlier Cosmicflows catalogues suggested that the Milky Way Galaxy was associated with a BoA called Laniakea. With the newer CF4 data, there is a slight probabilistic preference for Laniakea to be part of the much larger Shapley BoA. The largest BoA recovered from the CF4 data is associated with the Sloan Great Wall, with a volume within the sample of 15.5 × 10⁶(h⁻¹Mpc)³, which is more than twice the size of the second largest Shapley BoA.

宇宙的结构被认为是由早期宇宙暴胀引发的量子涨落演化而来。这些波动导致密度扰动，并通过引力不稳定性发展成大型宇宙结构。在线性区域中，结构的生长直接与速度场耦合，因为扰动会通过吸引（和加速）物质而放大。对星系红移和距离的调查可以让人们推断出潜在的密度和速度场。这里，假设宇宙学的 lambda 冷暗物质标准模型，并将哈密顿蒙特卡罗算法应用于 38,000 个星系组的分组 Cosmicflows-4 (CF4) 编译，宇宙的大尺度结构被重建为对应的红移至~30,000 km s ^{− 1} 。我们的方法提供了引力势最小值域的概率评估：吸引力盆地（BoA）。早期的宇宙流目录表明银河系与一个名为拉尼亚凯亚的BoA有关。根据最新的 CF4 数据，拉尼亚凯亚有轻微的概率偏好成为更大的 Shapley BoA 的一部分。从CF4数据中恢复的最大BoA与斯隆长城有关，样本内的体积为15.5 × 10 ⁶ ( h ^{− 1} Mpc) ³ ，是第二大Shapley BoA大小的两倍多。