The Atacama Cosmology Telescope: Weighing distant clusters with the most ancient light
Creators: name: Madhavacheril, Mathew S.
name: Sifón, Cristóbal
name: Battaglia, Nicholas
name: Aiola, Simone
name: Amodeo, Stefania
name: Austermann, Jason E.
name: Beall, James A.
name: Becker, Daniel T.
name: Bond, J. Richard
name: Calabrese, Erminia
name: Choi, Steve K.
name: Denison, Edward V.
name: Devlin, Mark J.
name: Dicker, Simon R.
name: Duff, Shannon M.
name: Duivenvoorden, Adriaan J.
name: Dunkley, Jo
name: Dünner, Rolando
name: Ferraro, Simone
name: Gallardo, Patricio A.
name: Guan, Yilun
name: Han, Dongwon
name: Hill, J. Colin
name: Hilton, Gene C.
name: Hilton, Matt
name: Hubmayr, Johannes
name: Huffenberger, Kevin M.
name: Hughes, John P.
name: Koopman, Brian J.
name: Kosowsky, Arthur
name: Van Lanen, Jeff
name: Lee, Eunseong
name: Louis, Thibaut
name: MacInnis, Amanda
name: McMahon, Jeffrey
name: Moodley, Kavilan
name: Naess, Sigurd
name: Namikawa, Toshiya
name: Nati, Federico
name: Newburgh, Laura
name: Niemack, Michael D.
name: Page, Lyman A.
name: Partridge, Bruce
name: Qu, Frank J.
name: Robertson, Naomi C.
name: Salatino, Maria
name: Schaan, Emmanuel
name: Schillaci, Alessandro
name: Schmitt, Benjamin L.
name: Sehgal, Neelima
name: Sherwin, Blake D.
name: Simon, Sara M.
name: Spergel, David N.
name: Staggs, Suzanne
name: Storer, Emilie R.
name: Ullom, Joel N.
name: Vale, Leila R.
name: van Engelen, Alexander
name: Vavagiakis, Eve M.
name: Wollack, Edward J.
name: Xu, Zhilei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We use gravitational lensing of the cosmic microwave background (CMB) to measure the mass of the most distant blindly-selected sample of galaxy clusters on which a lensing measurement has been performed to date. In CMB data from the the Atacama Cosmology Telescope (ACT) and the Planck satellite, we detect the stacked lensing effect from 677 near-infrared-selected galaxy clusters from the Massive and Distant Clusters of WISE Survey (MaDCoWS), which have a mean redshift of $ \langle z \rangle = 1.08$. There are no current optical weak lensing measurements of clusters that match the distance and average mass of this sample. We detect the lensing signal with a significance of $4.2 σ$. We model the signal with a halo model framework to find the mean mass of the population from which these clusters are drawn. Assuming that the clusters follow Navarro-Frenk-White density profiles, we infer a mean mass of $\langle M_{500c}\rangle = \left(1.7 \pm 0.4 \right)\times10^{14}\,\mathrm{M}_\odot$. We consider systematic uncertainties from cluster redshift errors, centering errors, and the shape of the NFW profile. These are all smaller than 30% of our reported uncertainty. This work highlights the potential of CMB lensing to enable cosmological constraints from the abundance of distant clusters populating ever larger volumes of the observable Universe, beyond the capabilities of optical weak lensing measurements.
description: 14 pages, 3 figures, matches version accepted in ApJL, code available at https://github.com/ACTCollaboration/madcows_lensing/