학술논문
Superclustering with the Atacama Cosmology Telescope and Dark Energy Survey. I. Evidence for Thermal Energy Anisotropy Using Oriented Stacking
Document Type
article
Author
Lokken, M; Hložek, R; van Engelen, A; Madhavacheril, M; Baxter, E; DeRose, J; Doux, C; Pandey, S; Rykoff, ES; Stein, G; To, C; Abbott, TMC; Adhikari, S; Aguena, M; Allam, S; Andrade-Oliveira, F; Annis, J; Battaglia, N; Bernstein, GM; Bertin, E; Bond, JR; Brooks, D; Calabrese, E; Rosell, A Carnero; Kind, M Carrasco; Carretero, J; Cawthon, R; Choi, A; Costanzi, M; Crocce, M; da Costa, LN; da Silva Pereira, ME; De Vicente, J; Desai, S; Dietrich, JP; Doel, P; Dunkley, J; Everett, S; Evrard, AE; Ferraro, S; Flaugher, B; Fosalba, P; Frieman, J; Gallardo, PA; García-Bellido, J; Gaztanaga, E; Gerdes, DW; Giannantonio, T; Gruen, D; Gruendl, RA; Gschwend, J; Gutierrez, G; Hill, JC; Hilton, M; Hincks, AD; Hinton, SR; Hollowood, DL; Honscheid, K; Hoyle, B; Huang, Z; Hughes, JP; Huterer, D; Jain, B; James, DJ; Jeltema, T; Kuehn, K; Lima, M; Maia, MAG; Marshall, JL; McMahon, J; Melchior, P; Menanteau, F; Miquel, R; Mohr, JJ; Moodley, K; Morgan, R; Nati, F; Page, L; Ogando, RLC; Palmese, A; Paz-Chinchón, F; Malagón, AA Plazas; Pieres, A; Romer, AK; Rozo, E; Sanchez, E; Scarpine, V; Schillaci, A; Schubnell, M; Serrano, S; Sevilla-Noarbe, I; Sheldon, E; Shin, T; Sifón, C; Smith, M; Soares-Santos, M; Suchyta, E; Swanson, MEC; Tarle, G; Thomas, D
Source
The Astrophysical Journal. 933(2)
Subject
Language
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.