2020/04/03 by Omar Darwish, Mathew S. Madhavacheril, Blake Sherwin +66 · 111 citations
Physics and Astronomy · #Anisotropy #Astronomy #Astrophysics #Cosmic background radiation #Cosmic infrared background #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy cluster #Gravitational lens #Observational cosmology #Physics #Planck #Radio Astronomy Observations and Technology #Redshift #Sky #South Pole Telescope #Weak gravitational lensing #astro-ph.CO #astro-ph.GA
paper · pdf · doi:10.1093/mnras/staa3438
published in Monthly Notices of the Royal Astronomical Society 500(2), 2250-2263 (Oxford University Press) · 16 pages, 11 figures, lensing map products will be made available on LAMBDA as part of the upcoming ACT data release, v2 corrects author list
arxiv created 2020/04/03 · openalex publication_date 2020/11/04 · arxiv updated 2020/11/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
ABSTRACT We construct cosmic microwave background lensing mass maps using data from the 2014 and 2015 seasons of observations with the Atacama Cosmology Telescope (ACT). These maps cover 2100 square degrees of sky and overlap with a wide variety of optical surveys. The maps are signal dominated on large scales and have fidelity such that their correlation with the cosmic infrared background is clearly visible by eye. We also create lensing maps with thermal Sunyaev−Zel’dovich contamination removed using a novel cleaning procedure that only slightly degrades the lensing signal-to-noise ratio. The cross-spectrum between the cleaned lensing map and the BOSS CMASS galaxy sample is detected at 10σ significance, with an amplitude of A = 1.02 ± 0.10 relative to the Planck best-fitting Lambda cold dark matter cosmological model with fiducial linear galaxy bias. Our measurement lays the foundation for lensing cross-correlation science with current ACT data and beyond.