“The Local Volume Complete Cluster Survey is an ongoing program to observe nearly a hundred low-redshift X-ray-luminous galaxy clusters … with the Dark Energy Camera, capturing data in [multiple] bands with a 5σ point source depth of approximately 25th–26th AB magnitudes. Here, we map the aperture masses in 58 galaxy cluster fields using weak gravitational lensing. … We find that the orientations of the BCG and the RS distribution are strongly aligned throughout the [cluster] interiors. … These types of alignment suggest long-term dynamical evolution within the clusters over cosmic timescales.”

Find the paper and full list of authors in The Astrophysical Journal.