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The Atacama Cosmology Telescope: weighing distant clusters with the most ancient light

Madhavacheril, Mathew S., Sifón, Cristóbal, Battaglia, Nicholas, Aiola, Simone, Amodeo, Stefania, Austermann, Jason E., Beall, James A., Becker, Daniel T., Bond, J. Richard, Calabrese, Erminia ORCID:, Choi, Steve K., Denison, Edward V., Devlin, Mark J., Dicker, Simon R., Duff, Shannon M., Duivenvoorden, Adriaan J., Dunkley, Jo, Dünner, Rolando, Ferraro, Simone, Gallardo, Patricio A., Guan, Yilun, Han, Dongwon, Hill, J. Colin, Hilton, Gene C., Hilton, Matt, Hubmayr, Johannes, Huffenberger, Kevin M., Hughes, John P., Koopman, Brian J., Kosowsky, Arthur, Lanen, Jeff Van, Lee, Eunseong, Louis, Thibaut, MacInnis, Amanda, McMahon, Jeffrey, Moodley, Kavilan, Naess, Sigurd, Namikawa, Toshiya, Nati, Federico, Newburgh, Laura, Niemack, Michael D., Page, Lyman A., Partridge, Bruce, Qu, Frank J., Robertson, Naomi C., Salatino, Maria, Schaan, Emmanuel, Schillaci, Alessandro, Schmitt, Benjamin L., Sehgal, Neelima, Sherwin, Blake D., Simon, Sara M., Spergel, David N., Staggs, Suzanne, Storer, Emilie R., Ullom, Joel N., Vale, Leila R., Engelen, Alexander van, Vavagiakis, Eve M., Wollack, Edward J. and Xu, Zhilei 2020. The Atacama Cosmology Telescope: weighing distant clusters with the most ancient light. Astrophysical Journal Letters 903 (1) , L13. 10.3847/2041-8213/abbccb

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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 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 currently no representative 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\sigma $. 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 (NFW) density profiles, we infer a mean mass of $\langle {M}_{500c}\rangle =\left(1.7\pm 0.4\right)\times {10}^{14}\,{M}_{\odot }$. 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.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: American Astronomical Society
ISSN: 2041-8205
Date of First Compliant Deposit: 6 November 2020
Date of Acceptance: 29 September 2020
Last Modified: 07 Nov 2023 04:34

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