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The Atacama Cosmology Telescope: delensed power spectra and parameters

Author(s): Han, Dongwon; Sehgal, Neelima; MacInnis, Amanda; Engelen, Alexander van; Sherwin, Blake D; et al

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dc.contributor.authorHan, Dongwon-
dc.contributor.authorSehgal, Neelima-
dc.contributor.authorMacInnis, Amanda-
dc.contributor.authorEngelen, Alexander van-
dc.contributor.authorSherwin, Blake D-
dc.contributor.authorMadhavacheril, Mathew S-
dc.contributor.authorAiola, Simone-
dc.contributor.authorBattaglia, Nicholas-
dc.contributor.authorBeall, James A-
dc.contributor.authorBecker, Daniel T-
dc.contributor.authorCalabrese, Erminia-
dc.contributor.authorChoi, Steve K-
dc.contributor.authorDarwish, Omar-
dc.contributor.authorDenison, Edward V-
dc.contributor.authorDevlin, Mark J-
dc.contributor.authorDunkley, Jo-
dc.contributor.authorFerraro, Simone-
dc.contributor.authorFox, Anna E-
dc.contributor.authorHasselfield, Matthew-
dc.contributor.authorHill, J Colin-
dc.contributor.authorHilton, Gene C-
dc.contributor.authorHilton, Matt-
dc.contributor.authorHložek, Renée-
dc.contributor.authorHubmayr, Johannes-
dc.contributor.authorHughes, John P-
dc.contributor.authorKosowsky, Arthur-
dc.contributor.authorLanen, Jeff Van-
dc.contributor.authorLouis, Thibaut-
dc.contributor.authorMoodley, Kavilan-
dc.contributor.authorNaess, Sigurd-
dc.contributor.authorNamikawa, Toshiya-
dc.contributor.authorNati, Federico-
dc.contributor.authorNibarger, John P-
dc.contributor.authorNiemack, Michael D-
dc.contributor.authorPage, Lyman A-
dc.contributor.authorPartridge, Bruce-
dc.contributor.authorQu, Frank J-
dc.contributor.authorSchillaci, Alessandro-
dc.contributor.authorSpergel, David N-
dc.contributor.authorStaggs, Suzanne-
dc.contributor.authorStorer, Emilie-
dc.contributor.authorWollack, Edward J-
dc.date.accessioned2024-06-12T18:47:44Z-
dc.date.available2024-06-12T18:47:44Z-
dc.date.issued2021-01-18en_US
dc.identifier.citationHan, Dongwon, Sehgal, Neelima, MacInnis, Amanda, Engelen, Alexander van, Sherwin, Blake D, Madhavacheril, Mathew S, Aiola, Simone, Battaglia, Nicholas, Beall, James A, Becker, Daniel T, Calabrese, Erminia, Choi, Steve K, Darwish, Omar, Denison, Edward V, Devlin, Mark J, Dunkley, Jo, Ferraro, Simone, Fox, Anna E, Hasselfield, Matthew, Hill, J Colin, Hilton, Gene C, Hilton, Matt, Hložek, Renée, Hubmayr, Johannes, Hughes, John P, Kosowsky, Arthur, Lanen, Jeff Van, Louis, Thibaut, Moodley, Kavilan, Naess, Sigurd, Namikawa, Toshiya, Nati, Federico, Nibarger, John P, Niemack, Michael D, Page, Lyman A, Partridge, Bruce, Qu, Frank J, Schillaci, Alessandro, Spergel, David N, Staggs, Suzanne, Storer, Emilie, Wollack, Edward J. (The Atacama Cosmology Telescope: delensed power spectra and parameters. Journal of Cosmology and Astroparticle Physics, 2021 (01), 031 - 031. doi:10.1088/1475-7516/2021/01/031en_US
dc.identifier.urihttp://arks.princeton.edu/ark:/88435/pr1sq8qj02-
dc.description.abstractWe present ΛCDM cosmological parameter constraints obtained from delensed microwave background power spectra. Lensing maps from a subset of DR4 data from the Atacama Cosmology Telescope (ACT) are used to undo the lensing effect in ACT spectra observed at 150 and 98 GHz. At 150 GHz, we remove the lensing distortion with an effective efficiency of 30% (T T ), 30% (EE), 26% (T E) and 20% (BB); this results in detections of the delensing effect at 8.7σ (T T ), 5.1σ (EE), 2.6σ (T E), and 2.4σ (BB) significance. The combination of 150 and 98 GHz T T, EE, and T E delensed spectra is well fit by a standard ΛCDM model. We also measure the shift in best-fit parameters when fitting delensed versus lensed spectra; while this shift does not inform our ability to measure cosmological param- eters, it does provide a three-way consistency check among the lensing inferred from the best-fit parameters, the lensing in the CMB power spectrum, and the reconstructed lensing map. This shift is predicted to be zero when fitting with the correct model since both lensed and delensed spectra originate from the same region of sky. Fitting with a ΛCDM model and marginalizing over foregrounds, we find that the shift in cosmological parameters is consis- tent with zero. Our results show that gravitational lensing of the microwave background is internally consistent within the framework of the standard cosmological model.en_US
dc.format.extent031 - 031en_US
dc.relation.ispartofJournal of Cosmology and Astroparticle Physicsen_US
dc.rightsAuthor's manuscripten_US
dc.subjectcosmological parameters from CMBR, weak gravitational lensingen_US
dc.titleThe Atacama Cosmology Telescope: delensed power spectra and parametersen_US
dc.typeJournal Articleen_US
dc.identifier.doidoi:10.1088/1475-7516/2021/01/031-
dc.date.eissued2021-01-18en_US
dc.identifier.eissn1475-7516-
pu.type.symplectichttp://www.symplectic.co.uk/publications/atom-terms/1.0/journal-articleen_US

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