DOE OSTI · 2499585
Copacabana: a probabilistic membership assignment method for galaxy clusters
Abstract
Cosmological analyses using galaxy clusters in optical/near-infrared photometric surveys require robust characterization of their galaxy content. Precisely determining which galaxies belong to a cluster is crucial. In this paper, we present the COlor Probabilistic Assignment of Clusters And BAyesiaN Analysis (Copacabana) algorithm. Copacabana computes membership probabilities for all galaxies within an aperture centred on the cluster using photometric redshifts, colours, and projected radial probability density functions. We use simulations to validate Copacabana and we show that it achieves up to 89 per cent membership accuracy with a mild dependence on photometric redshift uncertainties and choice of aperture size. We find that the precision of the photometric redshifts has the largest impact on the determination of the membership probabilities followed by the choice of the cluster aperture size. We also quantify how much these uncertainties in the membership probabilities affect the stellar mass–cluster mass scaling relation, a relation that directly impacts cosmology. Using the sum of the stellar masses weighted by membership probabilities (μ * ) as the observable, we find that Copacabana can reach an accuracy of 0.06 dex in the measurement of the scaling relation at low redshift for a Legacy Survey of Space and Time type survey. These results indicate the potential of Copacabana and μ * to be used in cosmological analyses of optically selected clusters in the future.
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Esteves, J H [Department of Physics, Harvard University , Cambridge, MA 02138 ,; Department of Physics, University of Michigan , Ann Arbor, MI 48109 ,] (ORCID:0000000343732386), Pereira, M E S [Hamburger Sternwarte, Universität Hamburg , Gojenbergsweg 112, D-21029 Hamburg ,] (ORCID:0000000271317684), Soares-Santos, M [Department of Physics, University of Zurich , Winterthurerstrasse 190, CH-8057 Zurich ,] (ORCID:0000000160828529), Annis, J [Fermi National Accelerator Laboratory , P. O. Box 500, Batavia, IL 60510 ,], Welch, B [Observational Cosmology Lab, NASA Goddard Space Flight Center , Greenbelt, MD 20771 ,; Department of Astronomy, University of Maryland , College Park, MD 20742 ,], Wu, H -Y [Department of Physics, Boise State University , Boise, ID 83725 ,], Palmese, A [Department of Physics, Carnegie Mellon University , Pittsburgh, PA 15312 ,], Farahi, A [Departments of Statistics and Data Science, University of Texas at Austin , Austin, TX 78757 ,] (ORCID:0000000307774618), Andrade-Oliveira, F [Department of Physics, University of Zurich , Winterthurerstrasse 190, CH-8057 Zurich ,], Lin, H [Fermi National Accelerator Laboratory , P. O. Box 500, Batavia, IL 60510 ,], García-Bellido, J [Instituto de Fisica Teorica UAM/CSIC, Universidad Autonoma de Madrid , E-28049 Madrid ,], Aguena, M [Laboratório Interinstitucional de e-Astronomia – LIneA , Rua Gal. José Cristino 77, Rio de Janeiro, RJ 20921-400 ,], Alves, O [Department of Physics, University of Michigan , Ann Arbor, MI 48109 ,], Bacon, D [Institute of Cosmology and Gravitation, University of Portsmouth , Portsmouth PO1 3FX ,], Bocquet, S [Faculty of Physics, University Observatory, Ludwig-Maximilians-Universität , Scheinerstr 1, D-81679 Munich ,], Brooks, D [Department of Physics & Astronomy, University College London , Gower Street, London WC1E 6BT ,], Rosell, A Carnero [Laboratório Interinstitucional de e-Astronomia – LIneA , Rua Gal. José Cristino 77, Rio de Janeiro, RJ 20921-400 ,; Instituto de Astrofisica de Canarias , E-38205 La Laguna, Tenerife ,; Departamento de Astrofísica, Universidad de La Laguna , E-38206 La Laguna, Tenerife ,], Carretero, J [Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB , E-08193 Bellaterra (Barcelona) ,], Costanzi, M [Astronomy Unit, Department of Physics, University of Trieste , via Tiepolo 11, I-34131 Trieste ,; INAF-Osservatorio Astronomico di Trieste , via G. B. Tiepolo 11, I-34143 Trieste ,; Institute for Fundamental Physics of the Universe , Via Beirut 2, I-34014 Trieste ,], da Costa, L N [Laboratório Interinstitucional de e-Astronomia – LIneA , Rua Gal. José Cristino 77, Rio de Janeiro, RJ 20921-400 ,], De Vicente, J [Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT) , Madrid E-28040 ,], Doel, P [Department of Physics & Astronomy, University College London , Gower Street, London WC1E 6BT ,], Everett, S [Jet Propulsion Laboratory, California Institute of Technology , 4800 Oak Grove Dr, Pasadena, CA 91109 ,], Flaugher, B [Fermi National Accelerator Laboratory , P. O. Box 500, Batavia, IL 60510 ,], Frieman, J [Fermi National Accelerator Laboratory , P. O. Box 500, Batavia, IL 60510 ,; Kavli Institute for Cosmological Physics, University of Chicago , Chicago, IL 60637 ,], Gruen, D [Faculty of Physics, University Observatory, Ludwig-Maximilians-Universität , Scheinerstr 1, D-81679 Munich ,], Gruendl, R A [Department of Astronomy, University of Illinois at Urbana-Champaign , 1002 W. Green Street, Urbana, IL 61801 ,; Center for Astrophysical Surveys, National Center for Supercomputing Applications , 1205 West Clark St, Urbana, IL 61801 ,], Gutierrez, G [Fermi National Accelerator Laboratory , P. O. Box 500, Batavia, IL 60510 ,], Hinton, S R [School of Mathematics and Physics, University of Queensland, Brisbane , QLD 4072 ,], Hollowood, D L [University of California, Santa Cruz, Santa Cruz Institute for Particle Physics , Santa Cruz, CA 95064 ,], Honscheid, K [Department of Physics, The Ohio State University , Columbus, OH 43210 ,; Center for Cosmology and Astro-Particle Physics, The Ohio State University , Columbus, OH 43210 ,], James, D J [Center for Astrophysics | Harvard & Smithsonian, 60 Garden Street , Cambridge, MA 02138 ,], Kuehn, K [Australian Astronomical Optics, Macquarie University , North Ryde, NSW 2113 ,; Lowell Observatory , 1400 Mars Hill Rd, Flagstaff, AZ 86001 ,], Lidman, C [Centre for Gravitational Astrophysics, College of Science, The Australian National University , ACT 2601 ,; The Research School of Astronomy and Astrophysics, Australian National University , ACT 2601 ,], Lima, M [Laboratório Interinstitucional de e-Astronomia – LIneA , Rua Gal. José Cristino 77, Rio de Janeiro, RJ 20921-400 ,; Departamento de Física Matemática, Instituto de Física, Universidade de São Paulo , CP 66318, São Paulo, SP 05314-970 ,], Marshall, J L [George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, and Department of Physics and Astronomy, Texas A&M University , College Station, TX 77843 ,], Mena-Fernández, J [LPSC Grenoble-53 , Avenue des Martyrs, F-38026 Grenoble ,], Miquel, R [Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB , E-08193 Bellaterra (Barcelona) ,; Institució Catalana de Recerca i Estudis Avançats , E-08010 Barcelona ,], Myles, J [Department of Astrophysical Sciences, Princeton University , Peyton Hall, Princeton, NJ 08544 ,], Ogando, R L C [Observatório Nacional , Rua Gal. José Cristino 77, Rio de Janeiro, RJ 20921-400 ,], Pieres, A [Laboratório Interinstitucional de e-Astronomia – LIneA , Rua Gal. José Cristino 77, Rio de Janeiro, RJ 20921-400 ,; Observatório Nacional , Rua Gal. José Cristino 77, Rio de Janeiro, RJ 20921-400 ,], Malagón, A A Plazas [Kavli Institute for Particle Astrophysics & Cosmology, Stanford University , P. O. Box 2450, Stanford, CA 94305 ,; SLAC National Accelerator Laboratory , Menlo Park, CA 94025 ,], Romer, A K [Department of Physics and Astronomy, Pevensey Building, University of Sussex , Brighton BN1 9QH ,], Sanchez, E [Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT) , Madrid E-28040 ,], Cid, D Sanchez [Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT) , Madrid E-28040 ,], Santiago, B [Laboratório Interinstitucional de e-Astronomia – LIneA , Rua Gal. José Cristino 77, Rio de Janeiro, RJ 20921-400 ,; Instituto de Física, UFRGS , Caixa Postal 15051, Porto Alegre, RS 91501-970 ,], Schubnell, M [Department of Physics, University of Michigan , Ann Arbor, MI 48109 ,], Sevilla-Noarbe, I [Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT) , Madrid E-28040 ,], Smith, M [School of Physics and Astronomy, University of Southampton , Southampton SO17 1BJ ,], Suchyta, E [Computer Science and Mathematics Division, Oak Ridge National Laboratory , Oak Ridge, TN 37831 ,], Swanson, M E C [Center for Astrophysical Surveys, National Center for Supercomputing Applications , 1205 West Clark St, Urbana, IL 61801 ,], Weaverdyck, N [Department of Physics, University of Michigan , Ann Arbor, MI 48109 ,; Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 ,], Wiseman, P [School of Physics and Astronomy, University of Southampton , Southampton SO17 1BJ ,], Yamamoto, M [Department of Physics, Duke University Durham , NC 27708 ,]. 2024-11-26. Copacabana: a probabilistic membership assignment method for galaxy clusters. https://doi.org/10.1093/mnras/stae2593
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