Constraints on cosmology and baryonic feedback with a joint analysis of Dark Energy Survey Year 3 lensing data and ACT DR6 thermal Sunyaev-Zel’dovich effect observations

We present a joint analysis of weak gravitational lensing (shear) data obtained from the first three years of observations by the Dark Energy Survey and thermal Sunyaev-Zel'dovich (tSZ) effect measurements from a combination of Atacama Cosmology Telescope (ACT) and Planck data. A combined analysis of shear (which traces the projected mass) with the tSZ effect (which traces the projected gas pressure) can jointly probe both the distribution of matter and the thermodynamic state of the gas, accounting for the correlated effects of baryonic feedback on both observables. We detect the shear$~\times~$tSZ cross-correlation at a 21$σ$ significance, the highest to date, after minimizing the bias from cosmic infrared background leakage in the tSZ map. By jointly modeling the small-scale shear auto-correlation and the shear$~\times~$tSZ cross-correlation, we obtain $S_8 = 0.811^{+0.015}_{-0.012}$ and $Ω_{\rm m} = 0.263^{+0.023}_{-0.030}$, results consistent with primary CMB analyses from Planck and P-ACT. We find evidence for reduced thermal gas pressure in dark matter halos with masses $M < 10^{14} \, M_{\odot}/h$, supporting predictions of enhanced feedback from active galactic nuclei on gas thermodynamics. A comparison of the inferred matter power suppression reveals a $2-4σ$ tension with hydrodynamical simulations that implement mild baryonic feedback, as our constraints prefer a stronger suppression. Finally, we investigate biases from cosmic infrared background leakage in the tSZ-shear cross-correlation measurements, employing mitigation techniques to ensure a robust inference. Our code is publicly available on GitHub.

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Journal
Physical review. D/Physical review. D.
Published
2026-11-09
DOI
https://doi.org/10.1103/zbwq-mjq5
Citations
41
Primary Topic
Cosmology and Gravitation Theories
Type
article
Field-Weighted Citation Impact
23.25

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article

Constraints on cosmology and baryonic feedback with a joint analysis of Dark Energy Survey Year 3 lensing data and ACT DR6 thermal Sunyaev-Zel’dovich effect observations

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41 citations
Physical review. D/Physical review. D.
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23.25
article

Constraints on cosmology and baryonic feedback with a joint analysis of Dark Energy Survey Year 3 lensing data and ACT DR6 thermal Sunyaev-Zel’dovich effect observations

Aaron J. Roodman, A Navarro-Alsina, J. Muir, J. Myles, S Pandey, W.G Hartley, H. Camacho, M. Gatti, T Shin, Aleksandra Kusiak, I. Harrison, S Dodelson, N.P. Kuropatkin, M. R. Becker, Martine Lokken, A. Troja, M Raveri, A Drlica-Wagner, Daniel Gruen, Pablo Lemos, Kavilan Moodley, Alexandre R. Refregier, G. Giannini, J. Prat, Erin Scott Sheldon, Alexandra Amon, A. Porredon, Eric Huff, Hung-Jin Huang, O. Alves, Xiao Fang, Andrew R. Liddle, Isaac Tutusaus, N. MacCrann, Vera Gluscevic, G. M. Bernstein, E. S. Rykoff, E. Krause, N. Weaverdyck, J. McCullough, K. Bechtol, Ashley J. Ross, Eric J. Baxter, P. Fosalba, J. Cordero, Aurelio Carnero Rosell, ENRIQUE GAZTAÑAGA, Shabbir Shaikh, Y. Omori, T. F. Eifler, R. H. Wechsler, Will Coulton, P.-F. Léget, C. To, Erminia Calabrese, K. Eckert, Cristobál Sifón, Agnès Ferté, A Campos, Dhayaa Anbajagane, Joseph DeRose, C. Sánchez, A. Choi, T.N Varga, Alex Alarcon, Mark J. Devlin, S. Everett, M. J. Jarvis, Richard P. Rollins, H. Thomas Diehl, K Herner, F. Andrade-Oliveira, Dragan Huterer A, Nicholas Battaglia, P. Chintalapati, Cyrille Doux, J. Colin Hill, Edward J. Wollack, Ignacio Sevilla-Noarbe, J. Elvin-Poole, J Blazek, R Chen, S. Samuroff, Bernardita Ried Guachalla, Youngsoo Park, M. A. Troxel, M Carrasco Kind, Bruce Partridge, M. Crocce, B Yanny, O. Friedrich, L F Secco, C. Davis, S. L. Bridle, Bhuvnesh Jain, R. A. Gruendl, R. Cawthon, J. E. Ossa Sanchez
article en
41 citations

Abstract

We present a joint analysis of weak gravitational lensing (shear) data obtained from the first three years of observations by the Dark Energy Survey and thermal Sunyaev-Zel'dovich (tSZ) effect measurements from a combination of Atacama Cosmology Telescope (ACT) and Planck data. A combined analysis of shear (which traces the projected mass) with the tSZ effect (which traces the projected gas pressure) can jointly probe both the distribution of matter and the thermodynamic state of the gas, accounting for the correlated effects of baryonic feedback on both observables. We detect the shear$~\times~$tSZ cross-correlation at a 21$σ$ significance, the highest to date, after minimizing the bias from cosmic infrared background leakage in the tSZ map. By jointly modeling the small-scale shear auto-correlation and the shear$~\times~$tSZ cross-correlation, we obtain $S_8 = 0.811^{+0.015}_{-0.012}$ and $Ω_{\rm m} = 0.263^{+0.023}_{-0.030}$, results consistent with primary CMB analyses from Planck and P-ACT. We find evidence for reduced thermal gas pressure in dark matter halos with masses $M < 10^{14} \, M_{\odot}/h$, supporting predictions of enhanced feedback from active galactic nuclei on gas thermodynamics. A comparison of the inferred matter power suppression reveals a $2-4σ$ tension with hydrodynamical simulations that implement mild baryonic feedback, as our constraints prefer a stronger suppression. Finally, we investigate biases from cosmic infrared background leakage in the tSZ-shear cross-correlation measurements, employing mitigation techniques to ensure a robust inference. Our code is publicly available on GitHub.

Physical review. D/Physical review. D.
Laboratoire de Physique Subatomique et de Cosmologie (FR), Université Paris Diderot (FR)
National Science Foundation, U.S. Department of Energy, National Aeronautics and Space Administration, Alfred P. Sloan Foundation, Princeton University, University of Pennsylvania, Ohio State University, University of Chicago, University of Portsmouth, Centres de Recerca de Catalunya, National Energy Research Scientific Computing Center, University College London, European Commission, University of Sussex, Deutsche Forschungsgemeinschaft, Generalitat de Catalunya, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Financiadora de Estudos e Projetos, Ministerio de Ciencia e Innovación, Agencia Nacional de Investigación y Desarrollo, Institut de Física d'Altes Energies, National Institute of Standards and Technology, University of Illinois at Urbana-Champaign, Office of Science, Science and Technology Facilities Council, European Regional Development Fund, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, High Energy Physics, Integrated Electronics Engineering Center, Binghamton University, Argonne National Laboratory, Fermilab, Lawrence Berkeley National Laboratory, SLAC National Accelerator Laboratory
Openalex Percentile: Top 0%
Cosmology and Gravitation Theories
23.25
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