What makes you think such regions exist in our universe?brianmck said:focal regions of lower density.
The Dipole Repeller is a large-scale structure in the universe that influences the motion of galaxies. It is identified as a region with a low density of galaxies, effectively acting as a repulsive force that pushes galaxies away, contributing to the overall flow of galaxies in the local universe.
The Dipole Repeller was discovered through detailed mapping of the velocities of galaxies. By analyzing the peculiar velocities—deviations from the expected Hubble flow—researchers identified a significant region that appeared to be exerting a repulsive influence, leading to the identification of the Dipole Repeller.
The Dipole Repeller, along with other structures like the Shapley Attractor, helps to explain the peculiar velocities of galaxies. It contributes to the large-scale motion of galaxies by pushing them away from regions of low density and towards regions of higher density, thus playing a crucial role in the cosmic web of galaxy clusters and voids.
The Dipole Repeller is not a physical object but rather a region characterized by a significant underdensity of matter. This underdensity creates a gravitational potential that results in a repulsive effect on surrounding galaxies, effectively influencing their motion through gravitational interactions.
The Dipole Repeller is part of the larger cosmic web that includes both attractors and repellers. Together, these structures shape the large-scale distribution and movement of galaxies. The interplay between regions of high density (attractors) and low density (repellers) helps to form the intricate patterns observed in the universe, such as galaxy clusters, filaments, and voids.