The Atacama Cosmology Telescope: A Measurement of the DR6 CMB Lensing Power Spectrum and Its Implications for Structure Growth

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

doi:10.3847/1538-4357/acfe06

The Atacama Cosmology Telescope: A Measurement of the DR6 CMB Lensing Power Spectrum and Its Implications for Structure Growth

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

Earth and Space Exploration, School of (SESE)

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

We present new measurements of cosmic microwave background (CMB) lensing over 9400 deg² of the sky. These lensing measurements are derived from the Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) CMB data set, which consists of five seasons of ACT CMB temperature and polarization observations. We determine the amplitude of the CMB lensing power spectrum at 2.3% precision (43σ significance) using a novel pipeline that minimizes sensitivity to foregrounds and to noise properties. To ensure that our results are robust, we analyze an extensive set of null tests, consistency tests, and systematic error estimates and employ a blinded analysis framework. Our CMB lensing power spectrum measurement provides constraints on the amplitude of cosmic structure that do not depend on Planck or galaxy survey data, thus giving independent information about large-scale structure growth and potential tensions in structure measurements. The baseline spectrum is well fit by a lensing amplitude of A _lens = 1.013 ± 0.023 relative to the Planck 2018 CMB power spectra best-fit ΛCDM model and A _lens = 1.005 ± 0.023 relative to the ACT DR4 + WMAP best-fit model. From our lensing power spectrum measurement, we derive constraints on the parameter combination S 8 CMBL ≡ σ 8 Ω m / 0.3 0.25 of S 8 CMBL = 0.818 ± 0.022 from ACT DR6 CMB lensing alone and S 8 CMBL = 0.813 ± 0.018 when combining ACT DR6 and Planck NPIPE CMB lensing power spectra. These results are in excellent agreement with ΛCDM model constraints from Planck or ACT DR4 + WMAP CMB power spectrum measurements. Our lensing measurements from redshifts z ∼ 0.5-5 are thus fully consistent with ΛCDM structure growth predictions based on CMB anisotropies probing primarily z ∼ 1100. We find no evidence for a suppression of the amplitude of cosmic structure at low redshifts.

Original language	English (US)
Article number	112
Journal	Astrophysical Journal
Volume	962
Issue number	2
DOIs	https://doi.org/10.3847/1538-4357/acfe06
State	Published - Feb 1 2024

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/1538-4357/acfe06

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Qu, F. J., Sherwin, B. D., Madhavacheril, M. S., Han, D., Crowley, K. T., Abril-Cabezas, I., Ade, P. A. R., Aiola, S., Alford, T., Amiri, M., Amodeo, S., An, R., Atkins, Z., Austermann, J. E., Battaglia, N., Battistelli, E. S., Beall, J. A., Bean, R., Beringue, B., ... Zheng, K. (2024). The Atacama Cosmology Telescope: A Measurement of the DR6 CMB Lensing Power Spectrum and Its Implications for Structure Growth. Astrophysical Journal, 962(2), Article 112. https://doi.org/10.3847/1538-4357/acfe06

Qu, FJ, Sherwin, BD, Madhavacheril, MS, Han, D, Crowley, KT, Abril-Cabezas, I, Ade, PAR, Aiola, S, Alford, T, Amiri, M, Amodeo, S, An, R, Atkins, Z, Austermann, JE, Battaglia, N, Battistelli, ES, Beall, JA, Bean, R, Beringue, B, Bhandarkar, T, Biermann, E, Bolliet, B, Bond, JR, Cai, H, Calabrese, E, Calafut, V, Capalbo, V, Carrero, F, Carron, J, Challinor, A, Chesmore, GE, Cho, HM, Choi, SK, Clark, SE, Rosado, RC, Cothard, NF, Coughlin, K, Coulton, W, Dalal, R, Darwish, O, Devlin, MJ, Dicker, S, Doze, P, Duell, CJ, Duff, SM, Duivenvoorden, AJ, Dunkley, J, Dünner, R, Fanfani, V, Fankhanel, M, Farren, G, Ferraro, S, Freundt, R, Fuzia, B, Gallardo, PA, Garrido, X, Gluscevic, V, Golec, JE, Guan, Y, Halpern, M, Harrison, I, Hasselfield, M, Healy, E, Henderson, S, Hensley, B, Hervías-Caimapo, C, Hill, JC, Hilton, GC, Hilton, M, Hincks, AD, Hložek, R, Ho, SPP, Huber, ZB, Hubmayr, J, Huffenberger, KM, Hughes, JP, Irwin, K, Isopi, G, Jense, HT, Keller, B, Kim, J, Knowles, K, Koopman, BJ, Kosowsky, A, Kramer, D, Kusiak, A, La Posta, A, Lague, A, Lakey, V, Lee, E, Li, Z, Li, Y, Limon, M, Lokken, M, Louis, T, Lungu, M, MacCrann, N, MacInnis, A, Maldonado, D, Maldonado, F, Mallaby-Kay, M, Marques, GA, McMahon, J, Mehta, Y, Menanteau, F, Moodley, K, Morris, TW, Mroczkowski, T, Naess, S, Namikawa, T, Nati, F, Newburgh, L, Nicola, A, Niemack, MD, Nolta, MR, Orlowski-Scherer, J, Page, LA, Pandey, S, Partridge, B, Prince, H, Puddu, R, Radiconi, F, Robertson, N, Rojas, F, Sakuma, T, Salatino, M, Schaan, E, Schmitt, BL, Sehgal, N, Shaikh, S, Sierra, C, Sievers, J, Sifón, C, Simon, S, Sonka, R, Spergel, DN, Staggs, ST, Storer, E, Switzer, ER, Tampier, N, Thornton, R, Trac, H, Treu, J, Tucker, C, Ullom, J, Vale, LR, Van Engelen, A, Van Lanen, J, van Marrewijk, J, Vargas, C, Vavagiakis, EM, Wagoner, K, Wang, Y, Wenzl, L, Wollack, EJ, Xu, Z, Zago, F & Zheng, K 2024, 'The Atacama Cosmology Telescope: A Measurement of the DR6 CMB Lensing Power Spectrum and Its Implications for Structure Growth', Astrophysical Journal, vol. 962, no. 2, 112. https://doi.org/10.3847/1538-4357/acfe06

@article{947fd7994b1b49af85836c9965309def,

title = "The Atacama Cosmology Telescope: A Measurement of the DR6 CMB Lensing Power Spectrum and Its Implications for Structure Growth",

abstract = "We present new measurements of cosmic microwave background (CMB) lensing over 9400 deg2 of the sky. These lensing measurements are derived from the Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) CMB data set, which consists of five seasons of ACT CMB temperature and polarization observations. We determine the amplitude of the CMB lensing power spectrum at 2.3% precision (43σ significance) using a novel pipeline that minimizes sensitivity to foregrounds and to noise properties. To ensure that our results are robust, we analyze an extensive set of null tests, consistency tests, and systematic error estimates and employ a blinded analysis framework. Our CMB lensing power spectrum measurement provides constraints on the amplitude of cosmic structure that do not depend on Planck or galaxy survey data, thus giving independent information about large-scale structure growth and potential tensions in structure measurements. The baseline spectrum is well fit by a lensing amplitude of A lens = 1.013 ± 0.023 relative to the Planck 2018 CMB power spectra best-fit ΛCDM model and A lens = 1.005 ± 0.023 relative to the ACT DR4 + WMAP best-fit model. From our lensing power spectrum measurement, we derive constraints on the parameter combination S 8 CMBL ≡ σ 8 Ω m / 0.3 0.25 of S 8 CMBL = 0.818 ± 0.022 from ACT DR6 CMB lensing alone and S 8 CMBL = 0.813 ± 0.018 when combining ACT DR6 and Planck NPIPE CMB lensing power spectra. These results are in excellent agreement with ΛCDM model constraints from Planck or ACT DR4 + WMAP CMB power spectrum measurements. Our lensing measurements from redshifts z ∼ 0.5-5 are thus fully consistent with ΛCDM structure growth predictions based on CMB anisotropies probing primarily z ∼ 1100. We find no evidence for a suppression of the amplitude of cosmic structure at low redshifts.",

author = "Qu, {Frank J.} and Sherwin, {Blake D.} and Madhavacheril, {Mathew S.} and Dongwon Han and Crowley, {Kevin T.} and Irene Abril-Cabezas and Ade, {Peter A.R.} and Simone Aiola and Tommy Alford and Mandana Amiri and Stefania Amodeo and Rui An and Zachary Atkins and Austermann, {Jason E.} and Nicholas Battaglia and Battistelli, {Elia Stefano} and Beall, {James A.} and Rachel Bean and Benjamin Beringue and Tanay Bhandarkar and Emily Biermann and Boris Bolliet and Bond, {J. Richard} and Hongbo Cai and Erminia Calabrese and Victoria Calafut and Valentina Capalbo and Felipe Carrero and Julien Carron and Anthony Challinor and Chesmore, {Grace E.} and Cho, {Hsiao Mei} and Choi, {Steve K.} and Clark, {Susan E.} and Rosado, {Rodrigo C{\'o}rdova} and Cothard, {Nicholas F.} and Kevin Coughlin and William Coulton and Roohi Dalal and Omar Darwish and Devlin, {Mark J.} and Simon Dicker and Peter Doze and Duell, {Cody J.} and Duff, {Shannon M.} and Duivenvoorden, {Adriaan J.} and Jo Dunkley and Rolando D{\"u}nner and Valentina Fanfani and Max Fankhanel and Gerrit Farren and Simone Ferraro and Rodrigo Freundt and Brittany Fuzia and Gallardo, {Patricio A.} and Xavier Garrido and Vera Gluscevic and Golec, {Joseph E.} and Yilun Guan and Mark Halpern and Ian Harrison and Matthew Hasselfield and Erin Healy and Shawn Henderson and Brandon Hensley and Carlos Herv{\'i}as-Caimapo and Hill, {J. Colin} and Hilton, {Gene C.} and Matt Hilton and Hincks, {Adam D.} and Ren{\'e}e Hlo{\v z}ek and Ho, {Shuay Pwu Patty} and Huber, {Zachary B.} and Johannes Hubmayr and Huffenberger, {Kevin M.} and Hughes, {John P.} and Kent Irwin and Giovanni Isopi and Jense, {Hidde T.} and Ben Keller and Joshua Kim and Kenda Knowles and Koopman, {Brian J.} and Arthur Kosowsky and Darby Kramer and Aleksandra Kusiak and {La Posta}, Adrien and Alex Lague and Victoria Lakey and Eunseong Lee and Zack Li and Yaqiong Li and Michele Limon and Martine Lokken and Thibaut Louis and Marius Lungu and Niall MacCrann and Amanda MacInnis and Diego Maldonado and Felipe Maldonado and Maya Mallaby-Kay and Marques, {Gabriela A.} and Jeff McMahon and Yogesh Mehta and Felipe Menanteau and Kavilan Moodley and Morris, {Thomas W.} and Tony Mroczkowski and Sigurd Naess and Toshiya Namikawa and Federico Nati and Laura Newburgh and Andrina Nicola and Niemack, {Michael D.} and Nolta, {Michael R.} and John Orlowski-Scherer and Page, {Lyman A.} and Shivam Pandey and Bruce Partridge and Heather Prince and Roberto Puddu and Federico Radiconi and Naomi Robertson and Felipe Rojas and Tai Sakuma and Maria Salatino and Emmanuel Schaan and Schmitt, {Benjamin L.} and Neelima Sehgal and Shabbir Shaikh and Carlos Sierra and Jon Sievers and Crist{\'o}bal Sif{\'o}n and Sara Simon and Rita Sonka and Spergel, {David N.} and Staggs, {Suzanne T.} and Emilie Storer and Switzer, {Eric R.} and Niklas Tampier and Robert Thornton and Hy Trac and Jesse Treu and Carole Tucker and Joel Ullom and Vale, {Leila R.} and {Van Engelen}, Alexander and {Van Lanen}, Jeff and {van Marrewijk}, Joshiwa and Cristian Vargas and Vavagiakis, {Eve M.} and Kasey Wagoner and Yuhan Wang and Lukas Wenzl and Wollack, {Edward J.} and Zhilei Xu and Fernando Zago and Kaiwen Zheng",

note = "Publisher Copyright: {\textcopyright} 2024. The Author(s). Published by the American Astronomical Society.",

year = "2024",

month = feb,

day = "1",

doi = "10.3847/1538-4357/acfe06",

language = "English (US)",

volume = "962",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "2",

}

TY - JOUR

T1 - The Atacama Cosmology Telescope

T2 - A Measurement of the DR6 CMB Lensing Power Spectrum and Its Implications for Structure Growth

AU - Qu, Frank J.

AU - Sherwin, Blake D.

AU - Madhavacheril, Mathew S.

AU - Han, Dongwon

AU - Crowley, Kevin T.

AU - Abril-Cabezas, Irene

AU - Ade, Peter A.R.

AU - Aiola, Simone

AU - Alford, Tommy

AU - Amiri, Mandana

AU - Amodeo, Stefania

AU - An, Rui

AU - Atkins, Zachary

AU - Austermann, Jason E.

AU - Battaglia, Nicholas

AU - Battistelli, Elia Stefano

AU - Beall, James A.

AU - Bean, Rachel

AU - Beringue, Benjamin

AU - Bhandarkar, Tanay

AU - Biermann, Emily

AU - Bolliet, Boris

AU - Bond, J. Richard

AU - Cai, Hongbo

AU - Calabrese, Erminia

AU - Calafut, Victoria

AU - Capalbo, Valentina

AU - Carrero, Felipe

AU - Carron, Julien

AU - Challinor, Anthony

AU - Chesmore, Grace E.

AU - Cho, Hsiao Mei

AU - Choi, Steve K.

AU - Clark, Susan E.

AU - Rosado, Rodrigo Córdova

AU - Cothard, Nicholas F.

AU - Coughlin, Kevin

AU - Coulton, William

AU - Dalal, Roohi

AU - Darwish, Omar

AU - Devlin, Mark J.

AU - Dicker, Simon

AU - Doze, Peter

AU - Duell, Cody J.

AU - Duff, Shannon M.

AU - Duivenvoorden, Adriaan J.

AU - Dunkley, Jo

AU - Dünner, Rolando

AU - Fanfani, Valentina

AU - Fankhanel, Max

AU - Farren, Gerrit

AU - Ferraro, Simone

AU - Freundt, Rodrigo

AU - Fuzia, Brittany

AU - Gallardo, Patricio A.

AU - Garrido, Xavier

AU - Gluscevic, Vera

AU - Golec, Joseph E.

AU - Guan, Yilun

AU - Halpern, Mark

AU - Harrison, Ian

AU - Hasselfield, Matthew

AU - Healy, Erin

AU - Henderson, Shawn

AU - Hensley, Brandon

AU - Hervías-Caimapo, Carlos

AU - Hill, J. Colin

AU - Hilton, Gene C.

AU - Hilton, Matt

AU - Hincks, Adam D.

AU - Hložek, Renée

AU - Ho, Shuay Pwu Patty

AU - Huber, Zachary B.

AU - Hubmayr, Johannes

AU - Huffenberger, Kevin M.

AU - Hughes, John P.

AU - Irwin, Kent

AU - Isopi, Giovanni

AU - Jense, Hidde T.

AU - Keller, Ben

AU - Kim, Joshua

AU - Knowles, Kenda

AU - Koopman, Brian J.

AU - Kosowsky, Arthur

AU - Kramer, Darby

AU - Kusiak, Aleksandra

AU - La Posta, Adrien

AU - Lague, Alex

AU - Lakey, Victoria

AU - Lee, Eunseong

AU - Li, Zack

AU - Li, Yaqiong

AU - Limon, Michele

AU - Lokken, Martine

AU - Louis, Thibaut

AU - Lungu, Marius

AU - MacCrann, Niall

AU - MacInnis, Amanda

AU - Maldonado, Diego

AU - Maldonado, Felipe

AU - Mallaby-Kay, Maya

AU - Marques, Gabriela A.

AU - McMahon, Jeff

AU - Mehta, Yogesh

AU - Menanteau, Felipe

AU - Moodley, Kavilan

AU - Morris, Thomas W.

AU - Mroczkowski, Tony

AU - Naess, Sigurd

AU - Namikawa, Toshiya

AU - Nati, Federico

AU - Newburgh, Laura

AU - Nicola, Andrina

AU - Niemack, Michael D.

AU - Nolta, Michael R.

AU - Orlowski-Scherer, John

AU - Page, Lyman A.

AU - Pandey, Shivam

AU - Partridge, Bruce

AU - Prince, Heather

AU - Puddu, Roberto

AU - Radiconi, Federico

AU - Robertson, Naomi

AU - Rojas, Felipe

AU - Sakuma, Tai

AU - Salatino, Maria

AU - Schaan, Emmanuel

AU - Schmitt, Benjamin L.

AU - Sehgal, Neelima

AU - Shaikh, Shabbir

AU - Sierra, Carlos

AU - Sievers, Jon

AU - Sifón, Cristóbal

AU - Simon, Sara

AU - Sonka, Rita

AU - Spergel, David N.

AU - Staggs, Suzanne T.

AU - Storer, Emilie

AU - Switzer, Eric R.

AU - Tampier, Niklas

AU - Thornton, Robert

AU - Trac, Hy

AU - Treu, Jesse

AU - Tucker, Carole

AU - Ullom, Joel

AU - Vale, Leila R.

AU - Van Engelen, Alexander

AU - Van Lanen, Jeff

AU - van Marrewijk, Joshiwa

AU - Vargas, Cristian

AU - Vavagiakis, Eve M.

AU - Wagoner, Kasey

AU - Wang, Yuhan

AU - Wenzl, Lukas

AU - Wollack, Edward J.

AU - Xu, Zhilei

AU - Zago, Fernando

AU - Zheng, Kaiwen

PY - 2024/2/1

Y1 - 2024/2/1

N2 - We present new measurements of cosmic microwave background (CMB) lensing over 9400 deg2 of the sky. These lensing measurements are derived from the Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) CMB data set, which consists of five seasons of ACT CMB temperature and polarization observations. We determine the amplitude of the CMB lensing power spectrum at 2.3% precision (43σ significance) using a novel pipeline that minimizes sensitivity to foregrounds and to noise properties. To ensure that our results are robust, we analyze an extensive set of null tests, consistency tests, and systematic error estimates and employ a blinded analysis framework. Our CMB lensing power spectrum measurement provides constraints on the amplitude of cosmic structure that do not depend on Planck or galaxy survey data, thus giving independent information about large-scale structure growth and potential tensions in structure measurements. The baseline spectrum is well fit by a lensing amplitude of A lens = 1.013 ± 0.023 relative to the Planck 2018 CMB power spectra best-fit ΛCDM model and A lens = 1.005 ± 0.023 relative to the ACT DR4 + WMAP best-fit model. From our lensing power spectrum measurement, we derive constraints on the parameter combination S 8 CMBL ≡ σ 8 Ω m / 0.3 0.25 of S 8 CMBL = 0.818 ± 0.022 from ACT DR6 CMB lensing alone and S 8 CMBL = 0.813 ± 0.018 when combining ACT DR6 and Planck NPIPE CMB lensing power spectra. These results are in excellent agreement with ΛCDM model constraints from Planck or ACT DR4 + WMAP CMB power spectrum measurements. Our lensing measurements from redshifts z ∼ 0.5-5 are thus fully consistent with ΛCDM structure growth predictions based on CMB anisotropies probing primarily z ∼ 1100. We find no evidence for a suppression of the amplitude of cosmic structure at low redshifts.

AB - We present new measurements of cosmic microwave background (CMB) lensing over 9400 deg2 of the sky. These lensing measurements are derived from the Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) CMB data set, which consists of five seasons of ACT CMB temperature and polarization observations. We determine the amplitude of the CMB lensing power spectrum at 2.3% precision (43σ significance) using a novel pipeline that minimizes sensitivity to foregrounds and to noise properties. To ensure that our results are robust, we analyze an extensive set of null tests, consistency tests, and systematic error estimates and employ a blinded analysis framework. Our CMB lensing power spectrum measurement provides constraints on the amplitude of cosmic structure that do not depend on Planck or galaxy survey data, thus giving independent information about large-scale structure growth and potential tensions in structure measurements. The baseline spectrum is well fit by a lensing amplitude of A lens = 1.013 ± 0.023 relative to the Planck 2018 CMB power spectra best-fit ΛCDM model and A lens = 1.005 ± 0.023 relative to the ACT DR4 + WMAP best-fit model. From our lensing power spectrum measurement, we derive constraints on the parameter combination S 8 CMBL ≡ σ 8 Ω m / 0.3 0.25 of S 8 CMBL = 0.818 ± 0.022 from ACT DR6 CMB lensing alone and S 8 CMBL = 0.813 ± 0.018 when combining ACT DR6 and Planck NPIPE CMB lensing power spectra. These results are in excellent agreement with ΛCDM model constraints from Planck or ACT DR4 + WMAP CMB power spectrum measurements. Our lensing measurements from redshifts z ∼ 0.5-5 are thus fully consistent with ΛCDM structure growth predictions based on CMB anisotropies probing primarily z ∼ 1100. We find no evidence for a suppression of the amplitude of cosmic structure at low redshifts.

UR - http://www.scopus.com/inward/record.url?scp=85185774502&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85185774502&partnerID=8YFLogxK

U2 - 10.3847/1538-4357/acfe06

DO - 10.3847/1538-4357/acfe06

M3 - Article

AN - SCOPUS:85185774502

SN - 0004-637X

VL - 962

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 112

ER -

The Atacama Cosmology Telescope: A Measurement of the DR6 CMB Lensing Power Spectrum and Its Implications for Structure Growth

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