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

Lokken M.; Hlozek R.; Engelen A. V.; Madhavacheril M.; Baxter E.; Derose J.; Doux C.; Pandey S.; Rykoff E. S.; Stein G.; To C.; Abbott T. M. C.; Adhikari S.; Aguena M.; Allam S.; Andrade-Oliveira F.; Annis J.; Battaglia N.; Bernstein G. M.; Bertin E.; Bond J. R.; Brooks D.; Calabrese E.; Rosell A. C.; Kind M. C.; Carretero J.; Cawthon R.; Choi A.; Costanzi M.; Crocce M.; Costa L. N. D.; Pereira M. E. D. S.; Vicente J. D.; Desai S.; Dietrich J. P.; Doel P.; Dunkley J.; Everett S.; Evrard A. E.; Ferraro S.; Flaugher B.; Fosalba P.; Frieman J.; Gallardo P. A.; Garcia-Bellido J.; Gaztanaga E.; Gerdes D. W.; Giannantonio T.; Gruen D.; Gruendl R. A.; Gschwend J.; Gutierrez G.; Hill J. C.; Hilton M.; Hincks A. D.; Hinton S. R.; Hollowood D. L.; Honscheid K.; Hoyle B.; Huang Z.; Hughes J. P.; Huterer D.; Jain B.; James D. J.; Jeltema T.; Kuehn K.; Lima M.; Maia M. A. G.; Marshall J. L.; McMahon J.; Melchior P.; Menanteau F.; Miquel R.; Mohr J. J.; Moodley K.; Morgan R.; Nati F.; Page L.; Ogando R. L. C.; Palmese A.; Paz-Chinchon F.; Malagon A. A. P.; Pieres A.; Romer A. K.; Rozo E.; Sanchez E.; Scarpine V.; Schillaci A.; Schubnell M.; Serrano S.; Sevilla-Noarbe I.; Sheldon E.; Shin T.; Sifon C.; Smith M.; Soares-Santos M.; Suchyta E.; Swanson M. E. C.; Tarle G.; Thomas D.; Tucker D. L.; Varga T. N.; Weller J.; Wechsler R. H.; Wilkinson R. D.; Wollack E. J.; Xu Z.

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

Lokken M.

•

Hlozek R.

•

Engelen A. V.

altro

Xu Z.

2022

journal article

Periodico

THE ASTROPHYSICAL JOURNAL

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