Journal article

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

C Hennig, JJ Mohr, A Zenteno, S Desai, JP Dietrich, S Bocquet, V Strazzullo, A Saro, TMC Abbott, FB Abdalla, M Bayliss, A Benoit-Levy, RA Bernstein, E Bertin, D Brooks, R Capasso, D Capozzi, A Carnero, M Carrasco Kind, J Carretero Show all

Monthly Notices of the Royal Astronomical Society | Oxford University Press (OUP) | Published : 2017


We study the galaxy populations in 74 Sunyaev–Zeldovich 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 × 1014 M⊙ ≤ M200 ≤ 3 × 1015M⊙. Using the band containing the 4000 Å break and its redward neighbour, we study the colour–magnitude 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..

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University of Melbourne Researchers


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Awarded by UK Space Agency

Funding Acknowledgements

We acknowledge the support by the DFGCluster of Excellence `Origin and Structure of the Universe', the Transregio program TR33 `The Dark Universe' and the Ludwig-Maximilians-Universitat. The data processing has been carried out on the computing facilities of the Computational Center for Particle and Astrophysics (C2PAP), located at the Leibniz Supercomputer Center (LRZ).