Models in which these structures mimic dark energy acceleration have been proposed as alternatives to Lambda-CDM, but such models suffer from the fact that they violate homogeneity and require excessive fine-tuning.
In the DisPerSE formalism developed by Sousbie, et. al. these structures are analogous to ascending 3-manifolds. Models in which these structures mimic dark energy acceleration have been proposed as alternatives to Lambda-CDM, but such models suffer from the fact that they violate homogeneity and require excessive fine-tuning. One of these structures found in the Eridanus constellation corresponds directly to the "cold spot" in the WMAP images, and that structure may have produced the aforementioned "cold spot" via a late-time integrated Sachs-Wolfe effect. These regions are complementary to superclusters, and prime examples of these include the complement to the Local Group as well as the filament of the Perseus-Pisces cluster. For ten points, identify these cosmic regions of the universe which are nearly empty of observable matter.
In the DisPerSE formalism developed by Sousbie, et. al. these structures are analogous to ascending 3-manifolds.
cosmic voids