The Atacama Cosmology Telescope: DR6 Gravitational Lensing Map and Cosmological Parameters
Creators: name: Madhavacheril, Mathew S.
name: Qu, Frank J.
name: Sherwin, Blake D.
name: MacCrann, Niall
name: Li, Yaqiong
name: Abril-Cabezas, Irene
name: Ade, Peter A. R.
name: Aiola, Simone
name: Alford, Tommy
name: Amiri, Mandana
name: Amodeo, Stefania
name: An, Rui
name: Atkins, Zachary
name: Austermann, Jason E.
name: Battaglia, Nicholas
name: Battistelli, Elia Stefano
name: Beall, James A.
name: Bean, Rachel
name: Beringue, Benjamin
name: Bhandarkar, Tanay
name: Biermann, Emily
name: Bolliet, Boris
name: Bond, J Richard
name: Cai, Hongbo
name: Calabrese, Erminia
name: Calafut, Victoria
name: Capalbo, Valentina
name: Carrero, Felipe
name: Challinor, Anthony
name: Chesmore, Grace E.
name: Cho, Hsiao-mei
name: Choi, Steve K.
name: Clark, Susan E.
name: Rosado, Rodrigo Córdova
name: Cothard, Nicholas F.
name: Coughlin, Kevin
name: Coulton, William
name: Crowley, Kevin T.
name: Dalal, Roohi
name: Darwish, Omar
name: Devlin, Mark J.
name: Dicker, Simon
name: Doze, Peter
name: Duell, Cody J.
name: Duff, Shannon M.
name: Duivenvoorden, Adriaan J.
name: Dunkley, Jo
name: Dünner, Rolando
name: Fanfani, Valentina
name: Fankhanel, Max
name: Farren, Gerrit
name: Ferraro, Simone
name: Freundt, Rodrigo
name: Fuzia, Brittany
name: Gallardo, Patricio A.
name: Garrido, Xavier
name: Givans, Jahmour
name: Gluscevic, Vera
name: Golec, Joseph E.
name: Guan, Yilun
name: Hall, Kirsten R.
name: Halpern, Mark
name: Han, Dongwon
name: Harrison, Ian
name: Hasselfield, Matthew
name: Healy, Erin
name: Henderson, Shawn
name: Hensley, Brandon
name: Hervías-Caimapo, Carlos
name: Hill, J. Colin
name: Hilton, Gene C.
name: Hilton, Matt
name: Hincks, Adam D.
name: Hložek, Renée
name: Ho, Shuay-Pwu Patty
name: Huber, Zachary B.
name: Hubmayr, Johannes
name: Huffenberger, Kevin M.
name: Hughes, John P.
name: Irwin, Kent
name: Isopi, Giovanni
name: Jense, Hidde T.
name: Keller, Ben
name: Kim, Joshua
name: Knowles, Kenda
name: Koopman, Brian J.
name: Kosowsky, Arthur
name: Kramer, Darby
name: Kusiak, Aleksandra
name: La Posta, Adrien
name: Lague, Alex
name: Lakey, Victoria
name: Lee, Eunseong
name: Li, Zack
name: Limon, Michele
name: Lokken, Martine
name: Louis, Thibaut
name: Lungu, Marius
name: MacInnis, Amanda
name: Maldonado, Diego
name: Maldonado, Felipe
name: Mallaby-Kay, Maya
name: Marques, Gabriela A.
name: McMahon, Jeff
name: Mehta, Yogesh
name: Menanteau, Felipe
name: Moodley, Kavilan
name: Morris, Thomas W.
name: Mroczkowski, Tony
name: Naess, Sigurd
name: Namikawa, Toshiya
name: Nati, Federico
name: Newburgh, Laura
name: Nicola, Andrina
name: Niemack, Michael D.
name: Nolta, Michael R.
name: Orlowski-Scherer, John
name: Page, Lyman A.
name: Pandey, Shivam
name: Partridge, Bruce
name: Prince, Heather
name: Puddu, Roberto
name: Radiconi, Federico
name: Robertson, Naomi
name: Rojas, Felipe
name: Sakuma, Tai
name: Salatino, Maria
name: Schaan, Emmanuel
name: Schmitt, Benjamin L.
name: Sehgal, Neelima
name: Shaikh, Shabbir
name: Sierra, Carlos
name: Sievers, Jon
name: Sifón, Cristóbal
name: Simon, Sara
name: Sonka, Rita
name: Spergel, David N.
name: Staggs, Suzanne T.
name: Storer, Emilie
name: Switzer, Eric R.
name: Tampier, Niklas
name: Thornton, Robert
name: Trac, Hy
name: Treu, Jesse
name: Tucker, Carole
name: Ullom, Joel
name: Vale, Leila R.
name: Van Engelen, Alexander
name: Van Lanen, Jeff
name: van Marrewijk, Joshiwa
name: Vargas, Cristian
name: Vavagiakis, Eve M.
name: Wagoner, Kasey
name: Wang, Yuhan
name: Wenzl, Lukas
name: Wollack, Edward J.
name: Xu, Zhilei
name: Zago, Fernando
name: Zheng, Kaiwen
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We present cosmological constraints from a gravitational lensing mass map covering 9400 sq. deg. reconstructed from CMB measurements made by the Atacama Cosmology Telescope (ACT) from 2017 to 2021. In combination with BAO measurements (from SDSS and 6dF), we obtain the amplitude of matter fluctuations $σ_8 = 0.819 \pm 0.015$ at 1.8% precision, $S_8\equivσ_8({Ω_{\rm m}}/0.3)^{0.5}=0.840\pm0.028$ and the Hubble constant $H_0= (68.3 \pm 1.1)\, \text{km}\,\text{s}^{-1}\,\text{Mpc}^{-1}$ at 1.6% precision. A joint constraint with CMB lensing measured by the Planck satellite yields even more precise values: $σ_8 = 0.812 \pm 0.013$, $S_8\equivσ_8({Ω_{\rm m}}/0.3)^{0.5}=0.831\pm0.023$ and $H_0= (68.1 \pm 1.0)\, \text{km}\,\text{s}^{-1}\,\text{Mpc}^{-1}$. These measurements agree well with $Λ$CDM-model extrapolations from the CMB anisotropies measured by Planck. To compare these constraints to those from the KiDS, DES, and HSC galaxy surveys, we revisit those data sets with a uniform set of assumptions, and find $S_8$ from all three surveys are lower than that from ACT+Planck lensing by varying levels ranging from 1.7-2.1$σ$. These results motivate further measurements and comparison, not just between the CMB anisotropies and galaxy lensing, but also between CMB lensing probing $z\sim 0.5-5$ on mostly-linear scales and galaxy lensing at $z\sim 0.5$ on smaller scales. We combine our CMB lensing measurements with CMB anisotropies to constrain extensions of $Λ$CDM, limiting the sum of the neutrino masses to $\sum m_ν &lt; 0.13$ eV (95% c.l.), for example. Our results provide independent confirmation that the universe is spatially flat, conforms with general relativity, and is described remarkably well by the $Λ$CDM model, while paving a promising path for neutrino physics with gravitational lensing from upcoming ground-based CMB surveys.
description: 32 pages, 17 figures, replaced with version accepted in ApJ (Feb 2024). Cosmological likelihood data and mass maps are public here: https://lambda.gsfc.nasa.gov/product/act/actadv_prod_table.html ; likelihood software is here: https://github.com/ACTCollaboration/act_dr6_lenslike . Also see companion papers Qu et al and MacCrann et al