{"paper":{"title":"The Atacama Cosmology Telescope: DR6 Gravitational Lensing Map and Cosmological Parameters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"ACT DR6 lensing map gives σ8 = 0.819 ± 0.015 consistent with Planck ΛCDM extrapolations.","cross_cats":["hep-ph"],"primary_cat":"astro-ph.CO","authors_text":"Adam D. Hincks, Adriaan J. Duivenvoorden, Adrien La Posta, Aleksandra Kusiak, Alexander van Engelen, Alex Lague, Amanda MacInnis, Andrina Nicola, Anthony Challinor, Arthur Kosowsky, Benjamin Beringue, Benjamin L. Schmitt, Ben Keller, Blake D. Sherwin, Boris Bolliet, Brandon Hensley, Brian J. Koopman, Brittany Fuzia, Bruce Partridge, Carlos Herv\\'ias-Caimapo, Carlos Sierra, Carole Tucker, Cody J. Duell, Cristian Vargas, Crist\\'obal Sif\\'on, Darby Kramer, David N. Spergel, Diego Maldonado, Dongwon Han, Edward J. Wollack, Elia Stefano Battistelli, Emilie Storer, Emily Biermann, Emmanuel Schaan, Eric R. Switzer, Erin Healy, Erminia Calabrese, Eunseong Lee, Eve M. Vavagiakis, Federico Nati, Federico Radiconi, Felipe Carrero, Felipe Maldonado, Felipe Menanteau, Felipe Rojas, Fernando Zago, Frank J. Qu, Gabriela A. Marques, Gene C. Hilton, Gerrit Farren, Giovanni Isopi, Grace E. Chesmore, Heather Prince, Hidde T. Jense, Hongbo Cai, Hsiao-mei Cho, Hy Trac, Ian Harrison, Irene Abril-Cabezas, Jahmour Givans, James A. Beall, Jason E. Austermann, J. Colin Hill, Jeff McMahon, Jeff Van Lanen, Jesse Treu, Jo Dunkley, Joel Ullom, Johannes Hubmayr, John Orlowski-Scherer, John P. Hughes, Jon Sievers, Joseph E. Golec, Joshiwa van Marrewijk, Joshua Kim, J Richard Bond, Kaiwen Zheng, Kasey Wagoner, Kavilan Moodley, Kenda Knowles, Kent Irwin, Kevin Coughlin, Kevin M. Huffenberger, Kevin T. Crowley, Kirsten R. Hall, Laura Newburgh, Leila R. Vale, Lukas Wenzl, Lyman A. Page, Mandana Amiri, Maria Salatino, Marius Lungu, Mark Halpern, Mark J. Devlin, Martine Lokken, Mathew S. Madhavacheril, Matthew Hasselfield, Matt Hilton, Max Fankhanel, Maya Mallaby-Kay, Michael D. Niemack, Michael R. Nolta, Michele Limon, Naomi Robertson, Neelima Sehgal, Niall MacCrann, Nicholas Battaglia, Nicholas F. Cothard, Niklas Tampier, Omar Darwish, Patricio A. Gallardo, Peter A. R. Ade, Peter Doze, Rachel Bean, Ren\\'ee Hlo\\v{z}ek, Rita Sonka, Roberto Puddu, Robert Thornton, Rodrigo C\\'ordova Rosado, Rodrigo Freundt, Rolando D\\\"unner, Roohi Dalal, Rui An, Sara Simon, Shabbir Shaikh, Shannon M. Duff, Shawn Henderson, Shivam Pandey, Shuay-Pwu Patty Ho, Sigurd Naess, Simon Dicker, Simone Aiola, Simone Ferraro, Stefania Amodeo, Steve K. Choi, Susan E. Clark, Suzanne T. Staggs, Tai Sakuma, Tanay Bhandarkar, Thibaut Louis, Thomas W. Morris, Tommy Alford, Tony Mroczkowski, Toshiya Namikawa, Valentina Capalbo, Valentina Fanfani, Vera Gluscevic, Victoria Calafut, Victoria Lakey, William Coulton, Xavier Garrido, Yaqiong Li, Yilun Guan, Yogesh Mehta, Yuhan Wang, Zachary Atkins, Zachary B. Huber, Zack Li, Zhilei Xu","submitted_at":"2023-04-11T13:13:14Z","abstract_excerpt":"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 $\\sigma_8 = 0.819 \\pm 0.015$ at 1.8% precision, $S_8\\equiv\\sigma_8({\\Omega_{\\rm m}}/0.3)^{0.5}=0.840\\pm0.028$ 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 ev"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"These measurements agree well with ΛCDM-model extrapolations from the CMB anisotropies measured by Planck. A joint constraint with CMB lensing measured by the Planck satellite yields even more precise values: σ8 = 0.812 ± 0.013, S8 = 0.831 ± 0.023 and H0 = 68.1 ± 1.0 km/s/Mpc.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The lensing reconstruction and cosmological parameter fitting assume that the ACT data processing, foreground cleaning, and modeling of the lensing convergence power spectrum introduce no significant biases that would shift the reported σ8 and S8 values outside the quoted uncertainties.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"ACT DR6 CMB lensing map gives σ8 = 0.819 ± 0.015 and H0 = 68.3 ± 1.1 km/s/Mpc, consistent with Planck ΛCDM but 1.7-2.1σ higher in S8 than KiDS, DES, and HSC galaxy surveys.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"ACT DR6 lensing map gives σ8 = 0.819 ± 0.015 consistent with Planck ΛCDM extrapolations.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"e3318fd7ec1043bca29ed9c8841a6c9d6a317b02626b1b662731caaa87af7443"},"source":{"id":"2304.05203","kind":"arxiv","version":2},"verdict":{"id":"2e67e8a2-d730-4a81-bfc3-06020370e1dc","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-16T20:26:38.486291Z","strongest_claim":"These measurements agree well with ΛCDM-model extrapolations from the CMB anisotropies measured by Planck. A joint constraint with CMB lensing measured by the Planck satellite yields even more precise values: σ8 = 0.812 ± 0.013, S8 = 0.831 ± 0.023 and H0 = 68.1 ± 1.0 km/s/Mpc.","one_line_summary":"ACT DR6 CMB lensing map gives σ8 = 0.819 ± 0.015 and H0 = 68.3 ± 1.1 km/s/Mpc, consistent with Planck ΛCDM but 1.7-2.1σ higher in S8 than KiDS, DES, and HSC galaxy surveys.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The lensing reconstruction and cosmological parameter fitting assume that the ACT data processing, foreground cleaning, and modeling of the lensing convergence power spectrum introduce no significant biases that would shift the reported σ8 and S8 values outside the quoted uncertainties.","pith_extraction_headline":"ACT DR6 lensing map gives σ8 = 0.819 ± 0.015 consistent with Planck ΛCDM extrapolations."},"references":{"count":169,"sample":[{"doi":"","year":2016,"title":"Abazajianet al.[CMB-S4],CMB-S4 Science Book, First Edition","work_id":"a36703d1-7c55-4314-a1b3-cb1dfe4aaf4d","ref_index":1,"cited_arxiv_id":"1610.02743","is_internal_anchor":true},{"doi":"10.1103/physrevd.105.023520","year":2022,"title":"year = 2022, month = jan, volume =","work_id":"917e35b7-32d1-4e8c-b3d9-8326c98323b7","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1103/physrevlett.130.051801","year":2023,"title":"2023, , 130, 051801, 10.1103/PhysRevLett.130.051801","work_id":"1a15f2f6-bce3-40f0-afe2-04e7802b3664","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1103/physrevlett.113.021301","year":2014,"title":"Ade , P. 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