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1.	Palmese, A., et al. (author) Stellar mass as a galaxy cluster mass proxy : application to the Dark Energy Survey redMaPPer clusters 2020 In: \mnras. - : Oxford University Press (OUP). ; 493:4, s. 4591-4606 Journal article (peer-reviewed)abstract We introduce a galaxy cluster mass observable, μ⋆, based on the stellar masses of cluster members, and we present results for the Dark Energy Survey (DES) Year 1 (Y1) observations. Stellar masses are computed using a Bayesian model averaging method, and are validated for DES data using simulations and COSMOS data. We show that μ⋆ works as a promising mass proxy by comparing our predictions to X-ray measurements. We measure the X-ray temperature–μ⋆ relation for a total of 129 clusters matched between the wide-field DES Y1 redMaPPer catalogue and Chandra and XMM archival observations, spanning the redshift range 0.1 < z < 0.7. For a scaling relation that is linear in logarithmic space, we find a slope of α = 0.488 ± 0.043 and a scatter in the X-ray temperature at fixed μ⋆ of σlnTX\|μ⋆=0.266+0.019−0.020 for the joint sample. By using the halo mass scaling relations of the X-ray temperature from the Weighing the Giants program, we further derive the μ⋆-conditioned scatter in mass, finding σlnM\|μ⋆=0.26+0.15−0.10⁠. These results are competitive with well-established cluster mass proxies used for cosmological analyses, showing that μ⋆ can be used as a reliable and physically motivated mass proxy to derive cosmological constraints.

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Type of publication: journal article (1)

Type of content: peer-reviewed (1)

Author/Editor: Zhang, Y. (1); Desai, S. (1); Diehl, H. T. (1); Gutierrez, G. (1); Thomas, D. (1); Kuehn, K. (1); show more...; Buckley-Geer, E. (1); Fosalba, P. (1); Palmese, A. (1); Soares-Santos, M. (1); Mayers, J (1); Lin, H (1); Miquel, R (1); Giles, P. (1); Evrard, A. E. (1); Tarle, G (1); Liddle, A (1); Brooks, D. (1); Burke, D. L. (1); Carnero Rosell, A. (1); Carrasco Kind, M. (1); Carretero, J. (1); da Costa, L. N. (1); Dietrich, J. P. (1); Doel, P. (1); Flaugher, B. (1); Frieman, J. (1); Gerdes, D. W. (1); Gruen, D. (1); Gruendl, R. A. (1); Honscheid, K. (1); James, D. J. (1); Kuropatkin, N. (1); Lahav, O. (1); Maia, M. A. G. (1); Marshall, J. L. (1); Plazas, A. A. (1); Romer, A. K. (1); Rykoff, E. S. (1); Sanchez, E. (1); Schubnell, M. (1); Sevilla-Noarbe, I. (1); Sobreira, F. (1); Suchyta, E. (1); Swanson, M. E. C. (1); Vikram, V. (1); Walker, A. R. (1); Wechsler, R. H. (1); García-Bellido, J. (1); Mann, R. G. (1); show less...

University: Uppsala University (1)

Language: English (1)

Research subject (UKÄ/SCB): Natural sciences (1)

Year: 2020 (1)

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