Galaxy populations in massive galaxy clusters to z=1.1: colour distribution, concentration, halo occupation number and red sequence fraction Academic Article uri icon


  • 2017 The Authors. We study the galaxy populations in 74 SunyaevZeldovich effect selected clusters from the South Pole Telescope survey, which have been imaged in the science verification phase of the Dark Energy Survey. The sample extends up to z 1.1 with 4 10 14 M M 200 3 10 15 M. Using the band containing the 4000 break and its redward neighbour, we study the colourmagnitude distributions of cluster galaxies to m + 2, finding that: (1)The intrinsic rest frame g r colour width of the red sequence (RS) population is 0.03 out to z 0.85 with a preference for an increase to 0.07 at z = 1, and (2) the prominence of the RS declines beyond z 0.6. The spatial distribution of cluster galaxies is well described by the NFW profile out to 4R 200 with a concentration of c g = 3.59 +002018 , 5.37 +002724 and 1.38 +002119 for the full, the RS and the blue non-RS populations, respectively, but with 40 per cent to 55 per cent cluster to cluster variation and no statistically significant redshift or mass trends. The number of galaxies within the virial region N 200 exhibits a mass trend indicating that the number of galaxies per unit total mass is lower in the most massive clusters, and shows no significant redshift trend. The RS fraction within R 200 is (68 3) per cent at z = 0.46, varies from 55 per cent at z = 1 to 80 per cent at z = 0.1 and exhibits intrinsic variation among

published proceedings


altmetric score

  • 7.58

author list (cited authors)

  • Hennig, C., Mohr, J. J., Zenteno, A., Desai, S., Dietrich, J. P., Bocquet, S., ... Zhang, Y.

citation count

  • 25

complete list of authors

  • Hennig, C||Mohr, JJ||Zenteno, A||Desai, S||Dietrich, JP||Bocquet, S||Strazzullo, V||Saro, A||Abbott, TMC||Abdalla, FB||Bayliss, M||Benoit-Lévy, A||Bernstein, RA||Bertin, E||Brooks, D||Capasso, R||Capozzi, D||Carnero, A||Kind, M Carrasco||Carretero, J||Chiu, I||D’Andrea, CB||daCosta, LN||Diehl, HT||Doel, P||Eifler, TF||Evrard, AE||Fausti-Neto, A||Fosalba, P||Frieman, J||Gangkofner, C||Gonzalez, A||Gruen, D||Gruendl, RA||Gupta, N||Gutierrez, G||Honscheid, K||Hlavacek-Larrondo, J||James, DJ||Kuehn, K||Kuropatkin, N||Lahav, O||March, M||Marshall, JL||Martini, P||McDonald, M||Melchior, P||Miller, CJ||Miquel, R||Neilsen, E||Nord, B||Ogando, R||Plazas, AA||Reichardt, C||Romer, AK||Rozo, E||Rykoff, ES||Sanchez, E||Santiago, B||Schubnell, M||Sevilla-Noarbe, I||Smith, RC||Soares-Santos, M||Sobreira, F||Stalder, B||Stanford, SA||Suchyta, E||Swanson, MEC||Tarle, G||Thomas, D||Vikram, V||Walker, AR||Zhang, Y

publication date

  • January 2017