Superclustering with the Atacama Cosmology Telescope and Dark Energy Survey. I. Evidence for Thermal Energy Anisotropy Using Oriented Stacking

Abstract The cosmic web contains filamentary structure on a wide range of scales. On the largest scales, superclustering aligns multiple galaxy clusters along intercluster bridges, visible through their thermal Sunyaev–Zel’dovich signal in microwave background. We demonstrate new, flexible method to analyze hot gas from multiscale extended structures. use Compton y -map Atacama Cosmology Telescope (ACT) stacked redMaPPer cluster positions optical Dark Energy Survey (DES). Cutout images are oriented with large-scale information DES data such that is aligned before being overlaid. find evidence an quadrupole moment at 3.5 σ level, demonstrating energy surrounding anisotropically distributed. compare our ACT × results Buzzard simulations, finding broad agreement. Using we highlight promise this novel technique for constraining evolution anisotropic, non-Gaussian using future combinations and surveys.