Stellar mass as a galaxy cluster mass proxy: application to the Dark Energy Survey redMaPPer clusters Academic Article uri icon


  • Abstract We introduce a galaxy cluster mass observable, , 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 works as a promising mass proxy by comparing our predictions to X-ray measurements. We measure the X-ray temperature 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 = 0.4880.043 and a scatter in the X-ray temperature at fixed of $sigma _{{
    m ln} T_mathrm{ X}|mu _star }= 0.266^{+0.019}_{-0.020}$ 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 -conditioned scatter in mass, finding $sigma _{{
    m ln} M|mu _star }= 0.26^{+ 0.15}_{- 0.10}$. These results are competitive with well-established cluster mass proxies used for cosmological analyses, showing that can be used as a reliable and physically motivated mass proxy to derive cosmological constraints.

published proceedings


altmetric score

  • 11.93

author list (cited authors)

  • Palmese, A., Annis, J., Burgad, J., Farahi, A., Soares-Santos, M., Welch, B., ... Walker, A. R.

citation count

  • 27

complete list of authors

  • Palmese, A||Annis, J||Burgad, J||Farahi, A||Soares-Santos, M||Welch, B||Pereira, M da Silva||Lin, H||Bhargava, S||Hollowood, DL||Wilkinson, R||Giles, P||Jeltema, T||Romer, AK||Evrard, AE||Hilton, M||Cervantes, C Vergara||Bermeo, A||Mayers, J||DeRose, J||Gruen, D||Hartley, WG||Lahav, O||Leistedt, B||McClintock, T||Rozo, E||Rykoff, ES||Varga, TN||Wechsler, RH||Zhang, Y||Avila, S||Brooks, D||Buckley-Geer, E||Burke, DL||Rosell, A Carnero||Kind, M Carrasco||Carretero, J||Castander, FJ||Collins, C||da Costa, LN||Desai, S||De Vicente, J||Diehl, HT||Dietrich, JP||Doel, P||Flaugher, B||Fosalba, P||Frieman, J||Garcia-Bellido, J||Gerdes, DW||Gruendl, RA||Gschwend, J||Gutierrez, G||Honscheid, K||James, DJ||Krause, E||Kuehn, K||Kuropatkin, N||Liddle, A||Lima, M||Maia, MAG||Mann, RG||Marshall, JL||Menanteau, F||Miquel, R||Ogando, RLC||Plazas, AA||Roodman, A||Rooney, P||Sahlen, M||Sanchez, E||Scarpine, V||Schubnell, M||Serrano, S||Sevilla-Noarbe, I||Sobreira, F||Stott, J||Suchyta, E||Swanson, MEC||Tarle, G||Thomas, D||Tucker, DL||Viana, PTP||Vikram, V||Walker, AR

publication date

  • April 2020