DOE OSTI · 2477323
Improving galaxy cluster selection with the outskirt stellar mass of galaxies
Abstract
The number density and redshift evolution of optically selected galaxy clusters offer an independent measurement of the amplitude of matter fluctuations, 𝑆 8 . However, recent results have shown that clusters chosen by the redMaPPer algorithm show richness-dependent biases that affect the weak lensing signals and number densities of clusters, increasing uncertainty in the cluster mass calibration and reducing their constraining power. Here, in this work, we evaluate an alternative cluster proxy, outskirt stellar mass, 𝑀 out , defined as the total stellar mass within a [50, 100] kpc envelope centered on a massive galaxy. This proxy exhibits scatter comparable to redMaPPer richness, 𝜆, but is less likely to be subject to projection effects. We compare the Dark Energy Survey Year 3 redMaPPer cluster catalog with a 𝑀 out selected cluster sample from the Hyper-Suprime Camera survey. We use weak lensing measurements to quantify and compare the scatter of 𝑀 out and 𝜆 with halo mass. Our results show 𝑀 out has a scatter consistent with 𝜆, with a similar halo mass dependence, and that both proxies contain unique information about the underlying halo mass. We find 𝜆-selected samples introduce features into the measured ΔΣ signal that are not well fit by a log-normal scatter only model, absent in 𝑀 out selected samples. Our findings suggest that 𝑀 out offers an alternative for cluster selection with more easily calibrated selection biases, at least at the generally lower richnesses probed here. Combining both proxies may yield a mass proxy with a lower scatter and more tractable selection biases, enabling the use of lower mass clusters in cosmology. Finally, we find the scatter and slope in the 𝜆 −𝑀 out scaling relation to be 0.49 ±0.02 and 0.38 ±0.09.
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Kwiecien, Matthew [Univ. of California, Santa Cruz, CA (United States)] (ORCID:0000000239804087), Jeltema, Tesla [Univ. of California, Santa Cruz, CA (United States)] (ORCID:0000000160890365), Leauthaud, Alexie [Univ. of California, Santa Cruz, CA (United States)], Huang, Song [Tsinghua Univ., Beijing (China)] (ORCID:0000000313857591), Rykoff, Eli [Stanford Univ., CA (United States). Kavli Institute for Particle Astrophysics & Cosmology; SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)] (ORCID:0000000193763135), Heydenreich, Sven [Univ. of California, Santa Cruz, CA (United States)] (ORCID:0000000272734076), Lange, Johannes [Univ. of Michigan, Ann Arbor, MI (United States)] (ORCID:0000000224501366), Everett, Spencer [California Institute of Technology (CalTech), Pasadena, CA (United States). Jet Propulsion Lab. (JPL)], Zhou, Conghao [Univ. of California, Santa Cruz, CA (United States)], Kelly, Paige [Univ. of California, Davis, CA (United States)] (ORCID:0009000942133630), Zhang, Yuanyuan [National Optical-Infrared Astronomy Research Laboratory (NOIRLab), Tucson, AZ (United States)] (ORCID:0000000159694631), Shin, Tae-Hyeon [Stony Brook Univ., NY (United States)] (ORCID:0000000263895409), Golden-Marx, Jesse [Univ. of Nottingham (United Kingdom)] (ORCID:000000026394045X), Marshall, J. L. [Texas A & M Univ., College Station, TX (United States)], Aguena, M. [Laboratório Interinstitucional de e-Astronomia (Brazil)] (ORCID:0000000156796747), Allam, S. S. [Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)], Bocquet, S. [Ludwig Maximilian Univ. of Munich, Munich (Germany)], Brooks, D. [Univ. College London (United Kingdom)], Rosell, A. Carnero [Inst. of Astrophysics of the Canary Islands (Spain); Laboratório Interinstitucional de e-Astronomia (Brazil); Univ. of La Laguna (Spain)], Carretero, J. [Inst. for High Energy Physics (IFAE), Barcelona (Spain)] (ORCID:0000000231300204), da Costa, L. N. [Laboratório Interinstitucional de e-Astronomia (Brazil)], Pereira, M. E. S. [Univ. of Hamburg (Germany)] (ORCID:0000000271317684), Davis, T. M. [Univ. of Queensland, Brisbane, QLD (Australia)] (ORCID:0000000242138783), De Vicente, J. [Research Centre for Energy, Environment and Technology (CIEMAT), Madrid (Spain)] (ORCID:0000000183186813), Doel, P. [Univ. College London (United Kingdom)] (ORCID:0000000263974457), Ferrero, I. [Univ. of Oslo (Norway)], Flaugher, B. [Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)], Frieman, J. [Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Univ. of Chicago, IL (United States)] (ORCID:0000000340793263), García-Bellido, J. [Consejo Superior de Investigaciones Cientificas (CSIC), Madrid (Spain)] (ORCID:0000000293708360), Gatti, M. [Univ. of Pennsylvania, Philadelphia, PA (United States)], Gaztanaga, E. [Institute of Space Studies of Catalonia (IEEC); Univ. of Portsmouth (United Kingdom); Univ. Autonoma de Barcelona (Spain). Institute of Space Sciences (ICE, CSIC)] (ORCID:0000000196320815), Giannini, G. [Inst. for High Energy Physics (IFAE), Barcelona (Spain); Univ. of Chicago, IL (United States)], Gruen, D. [Ludwig Maximilian Univ. of Munich, Munich (Germany)] (ORCID:0000000332707644), Gruendl, R. A. [Univ. of Illinois at Urbana-Champaign, IL (United States). National Center for Supercomputing Applications (NCSA)] (ORCID:0000000245886517), Gutierrez, G. [Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)], Hinton, S. R. [Univ. of Queensland, Brisbane, QLD (Australia)] (ORCID:0000000320719349), Hollowood, D. L. [Univ. of California, Santa Cruz, CA (United States). Santa Cruz Institute for Particle Physics] (ORCID:0000000293694157), Honscheid, K. [The Ohio State Univ., Columbus, OH (United States)] (ORCID:0000000265502023), James, D. J. [Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States)], Lee, S. [California Institute of Technology (CalTech), Pasadena, CA (United States). Jet Propulsion Lab. (JPL)], Miquel, R. [Univ. Autonoma de Barcelona (Spain). Inst. Catalana de Recerca i Estudis Avancats (ICREA) and Inst. de Fisica d'Altes Energies (IFAE)] (ORCID:0000000266104836), Pieres, A. [Laboratório Interinstitucional de e-Astronomia (Brazil); National Observatory (Brazil)] (ORCID:0000000191866042), Malagón, A. A. Plazas [Stanford Univ., CA (United States). Kavli Institute for Particle Astrophysics & Cosmology; SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)] (ORCID:0000000225980514), Romer, A. K. [Univ. of Sussex, Brighton (United Kingdom)] (ORCID:000000029328879X), Samuroff, S. [Northeastern Univ., Boston, MA (United States); Inst. for High Energy Physics (IFAE), Barcelona (Spain)], Sanchez, E. [Research Centre for Energy, Environment and Technology (CIEMAT), Madrid (Spain)] (ORCID:0000000296468198), Santiago, B. [Federal University of Rio Grande do Sul (Brazil); Laboratório Interinstitucional de e-Astronomia (Brazil)] (ORCID:0000000176928495), Sevilla-Noarbe, I. [Research Centre for Energy, Environment and Technology (CIEMAT), Madrid (Spain)] (ORCID:0000000218311953), Smith, M. [Lancaster Univ., Bailrigg (United Kingdom)], Suchyta, Eric [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000270479358), Swanson, M. E. C. [Univ. of Illinois at Urbana-Champaign, IL (United States). National Center for Supercomputing Applications (NCSA)] (ORCID:0000000214888552), Tarle, G. [Univ. of Michigan, Ann Arbor, MI (United States)] (ORCID:0000000317040781), Tucker, D. L. [Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)] (ORCID:0000000172115729), Vikram, V. [Argonne National Lab., Argonne, IL (United States)] (ORCID:0000000245058754), Weaverdyck, N. [University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)] (ORCID:0000000193825199), Wiseman, P. [Univ. of Southampton (United Kingdom)] (ORCID:0000000230731512). 2025-06-16. Improving galaxy cluster selection with the outskirt stellar mass of galaxies. https://doi.org/10.1103/1j5f-cmkg
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