2023MNRAS.526.4490P

It is natural to wonder how far the flat pattern in the distribution of galaxies and clusters of galaxies around the de Vaucoueurs Local Supercluster extends, and whether there are other similarly extended flat patterns in the large-scale structure of the Universe. I present evidence of two extended flat and thin sheet-like patterns in the distributions of galaxies and clusters detected at redshift z < 0.021. Sheet A contains our position and is tilted 11° from the supergalactic pole, meaning the Local Supercluster is a moderately bent part of the more extended Sheet A. The continuation of this sheet is detected in the disjoint sample of galaxies at redshifts 0.021 < z < 0.041 and again in the disjoint samples of galaxies and clusters of galaxies at 0.042 < z < 0.085. Sheet B is 15 Mpc from us at its closest point. It is detected at z < 0.021 and at 0.021 < z < 0.041. These results make a serious case for the reality of signatures of close to flat and thin extended sheet-like patterns in cosmic structure, and an interesting challenge for the lambda-cold dark matter cosmology.