Galaxy cluster matter profiles
Year: 2025
Type: article
Abstract: We present a study of the weak lensing inferred matter profiles ΔΣ(R) of 698 South Pole Telescope (SPT) thermal Sunyaev-Zel’dovich effect (tSZE) selected and MCMF optically confirmed galaxy clusters in the redshift range 0.25 < z < 0.94 that have associated weak gravitational lensing shear profiles from the Dark Energy Survey (DES). Rescaling these profiles to account for the mass dependent size and the redshift dependent density produces average rescaled matter profiles ΔΣ(R/R200c)/(ρcritR200c) with a lower dispersion than the unscaled ΔΣ(R) versions, indicating a significant degree of self-similarity. Galaxy clusters from hydrodynamical simulations also exhibit matter profiles that suggest a high degree of self-similarity, with RMS variation among the average rescaled matter profiles with redshift and mass falling by a factor of approximately six and 23, respectively, compared to the unscaled average matter profiles. We employed this regularity in a new Bayesian method for weak lensing mass calibration that employs the so-called cluster mass posterior P(M200|ζ̂, λ̂, z), which describes the individual cluster masses given their tSZE (ζ̂) and optical (λ̂, z) observables. This method enables simultaneous constraints on richness λ-mass and tSZE detection significance ζ-mass relations using average rescaled cluster matter profiles. We validated the method using realistic mock datasets and present observable-mass relation constraints for the SPT×DES sample, where we constrained the amplitude, mass trend, redshift trend, and intrinsic scatter. Our observable-mass relation results are in agreement with the mass calibration derived from the recent cosmological analysis of the SPT×DES data based on a cluster-by-cluster lensing calibration. Our new mass calibration technique offers a higher efficiency when compared to the single cluster calibration technique. We present new validation tests of the observable-mass relation that indicate the underlying power-law form and scatter are adequate to describe the real cluster sample but that also suggest a redshift variation in the intrinsic scatter of the λ-mass relation may offer a better description. In addition, the average rescaled matter profiles offer high signal-to-noise ratio (S/N) constraints on the shape of real cluster matter profiles, which are in good agreement with available hydrodynamical ΛCDM simulations. This high S/N profile contains information about baryon feedback, the collisional nature of dark matter, and potential deviations from general relativity.
Source: Astronomy and Astrophysics
Authors: A. Singh, J. J. Mohr, C. T. Davies, S. Bocquet, S. Grandis, M. Klein, J. L. Marshall, M. Aguena, S. S. Allam, O. Alves, F. Andrade-Oliveira, D. Bacon, S. Bhargava, D. Brooks, A. Carnero Rosell, J. Carretero, M. Costanzi, L. N. da Costa, M. E. S. Pereira, S. Desai, H. T. Diehl, P. Doel, S. Everett, B. Flaugher, J. Frieman, J. García-Bellido, E. Gaztanaga, R. A. Gruendl, G. Gutierrez, D. L. Hollowood, K. Honscheid, D. J. James, K. Kuehn, M. Lima, J. Mena-Fernández, F. Menanteau, R. Miquel, J. Myles, A. Pieres, A. K. Romer, S. Samuroff, E. Sanchez, D. Sanchez Cid, I. Sevilla-Noarbe, M. Smith, E. Suchyta, M. E. C. Swanson, G. Tarle, C. To, D. L. Tucker, V. Vikram, N. Weaverdyck, P. Wiseman
Institutions: Max Planck Institute for Extraterrestrial Physics, Ludwig-Maximilians-Universität München, Universität Innsbruck, Texas A&M University, Laboratório Interinstitucional de e-Astronomia, Fermi National Accelerator Laboratory, University of Michigan, Universidade Estadual Paulista (Unesp), University of Portsmouth, University of Sussex, University College London, Instituto de Astrofísica de Canarias, Institute for High Energy Physics, Barcelona Institute of Science and Technology, University of Trieste, Trieste Astronomical Observatory, Institute for Fundamental Physics of the Universe, Universität Hamburg, Indian Institute of Technology Hyderabad, California Institute of Technology, Jet Propulsion Laboratory, University of Chicago, Consejo Superior de Investigaciones Científicas, Instituto de Física Teórica, Universidad Autónoma de Madrid, Institute of Space Sciences, Institut d'Estudis Espacials de Catalunya, University of Illinois Urbana-Champaign, National Center for Supercomputing Applications, University of California, Santa Cruz, The Ohio State University, Center for Astrophysics Harvard & Smithsonian, Lowell Observatory, Australian Astronomical Optics, Universidade de São Paulo, Laboratoire de Physique Subatomique et de Cosmologie, Institució Catalana de Recerca i Estudis Avançats, Princeton University, National Observatory, Northeastern University, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, University of Southampton, Oak Ridge National Laboratory, Argonne National Laboratory, Lawrence Berkeley National Laboratory, University of California, Berkeley
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,865
Funders: National Science Foundation, U.S. Department of Energy, University of Pennsylvania, Ohio State University, University of Chicago, University of Portsmouth, Centres de Recerca de Catalunya, University College London, European Commission, University of Sussex, Deutsche Forschungsgemeinschaft, Generalitat de Catalunya, Ministério da Ciência, Tecnologia e Inovação, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Max-Planck-Gesellschaft, Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, Financiadora de Estudos e Projetos, Ministerio de Ciencia e Innovación, Institut de Física d'Altes Energies, 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, FP7 Ideas: European Research Council, SLAC National Accelerator Laboratory
Awards: G102163711, G1054097061, G1055550527, G107546177, G1249197737, G1265542407, Capitalizing on Gravitational Shear, G1313983767, G1328166135, G1491530973, G154696372, Testing the Dark Energy Paradigm and Measuring Neutrino Mass with the Dark Energy Survey, G1664757510, G1682672702, G1907584174, G1993551506, G2287611682, G2401681081, G262962599, G265847165, G2916908045, G3075337988, G3154116105, G3207356259, G3467815775, G3479632140, G3523651922, G3586607516, G3715052068, G3740091667, The Dark Energy Survey Data Management Operations, G3870743921, G393177772, G3968781304, G4104599821, G4158950854, G419118642, G4269941704, G4334057779, G4404904460, G4478587286, G454676879, Understanding the Origin of Cosmic Structure, G4760961572, G490073602, G496129201, G498139845, G513797252, G5560389312, G5616713406, G5617605617, G5702163051, G585908603, Continuing Operation of the Antarctic Submillimeter Telescope and Remote Observatory (AST/RO), G6256534168, G6480793128, G6514847661, G6619390584, G6636566961, G6676276723, G6731467812, G6848031779, G6918803902, G7038324121, G716412294, G7290792616, G7617409577, G7696246063, G7711421660, G7788408655, G7835623888, G7954596376, Collaborative Research: The Dark Energy Survey Data Management Operations, G8581667079, South Pole Telescope Operations and Data Products, G86560745, G8755702448, G969889393, G993149817
OpenAlex ID: W4408220435