Dark Energy Survey Year 1 Results: Weak Lensing Mass Calibration of redMaPPer Galaxy Clusters
Creators: name: McClintock, T.
name: Varga, T. N.
name: Gruen, D.
name: Rozo, E.
name: Rykoff, E. S.
name: Shin, T.
name: Melchior, P.
name: DeRose, J.
name: Seitz, S.
name: Dietrich, J. P.
name: Sheldon, E.
name: Zhang, Y.
name: von der Linden, A.
name: Jeltema, T.
name: Mantz, A.
name: Romer, A. K.
name: Allen, S.
name: Becker, M. R.
name: Bermeo, A.
name: Bhargava, S.
name: Costanzi, M.
name: Everett, S.
name: Farahi, A.
name: Hamaus, N.
name: Hartley, W. G.
name: Hollowood, D. L.
name: Hoyle, B.
name: Israel, H.
name: Li, P.
name: MacCrann, N.
name: Morris, G.
name: Palmese, A.
name: Plazas, A. A.
name: Pollina, G.
name: Rau, M. M.
name: Simet, M.
name: Soares-Santos, M.
name: Troxel, M. A.
name: Cervantes, C. Vergara
name: Wechsler, R. H.
name: Zuntz, J.
name: Abbott, T. M. C.
name: Abdalla, F. B.
name: Allam, S.
name: Annis, J.
name: Avila, S.
name: Bridle, S. L.
name: Brooks, D.
name: Burke, D. L.
name: Rosell, A. Carnero
name: Kind, M. Carrasco
name: Carretero, J.
name: Castander, F. J.
name: Crocce, M.
name: Cunha, C. E.
name: D'Andrea, C. B.
name: da Costa, L. N.
name: Davis, C.
name: De Vicente, J.
name: Diehl, H. T.
name: Doel, P.
name: Drlica-Wagner, A.
name: Evrard, A. E.
name: Flaugher, B.
name: Fosalba, P.
name: Frieman, J.
name: García-Bellido, J.
name: Gaztanaga, E.
name: Gerdes, D. W.
name: Giannantonio, T.
name: Gruendl, R. A.
name: Gutierrez, G.
name: Honscheid, K.
name: James, D. J.
name: Kirk, D.
name: Krause, E.
name: Kuehn, K.
name: Lahav, O.
name: Li, T. S.
name: Lima, M.
name: March, M.
name: Marshall, J. L.
name: Menanteau, F.
name: Miquel, R.
name: Mohr, J. J.
name: Nord, B.
name: Ogando, R. L. C.
name: Roodman, A.
name: Sanchez, E.
name: Scarpine, V.
name: Schindler, R.
name: Sevilla-Noarbe, I.
name: Smith, M.
name: Smith, R. C.
name: Sobreira, F.
name: Suchyta, E.
name: Swanson, M. E. C.
name: Tarle, G.
name: Tucker, D. L.
name: Vikram, V.
name: Walker, A. R.
name: Weller, J.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We constrain the mass--richness scaling relation of redMaPPer galaxy clusters identified in the Dark Energy Survey Year 1 data using weak gravitational lensing. We split clusters into $4\times3$ bins of richness $λ$ and redshift $z$ for $λ\geq20$ and $0.2 \leq z \leq 0.65$ and measure the mean masses of these bins using their stacked weak lensing signal. By modeling the scaling relation as $\langle M_{\rm 200m}|λ,z\rangle = M_0 (λ/40)^F ((1+z)/1.35)^G$, we constrain the normalization of the scaling relation at the 5.0 per cent level as $M_0 = [3.081 \pm 0.075 ({\rm stat}) \pm 0.133 ({\rm sys})] \cdot 10^{14}\ {\rm M}_\odot$ at $λ=40$ and $z=0.35$. The richness scaling index is constrained to be $F=1.356 \pm 0.051\ ({\rm stat})\pm 0.008\ ({\rm sys})$ and the redshift scaling index $G=-0.30\pm 0.30\ ({\rm stat})\pm 0.06\ ({\rm sys})$. These are the tightest measurements of the normalization and richness scaling index made to date. We use a semi-analytic covariance matrix to characterize the statistical errors in the recovered weak lensing profiles. Our analysis accounts for the following sources of systematic error: shear and photometric redshift errors, cluster miscentering, cluster member dilution of the source sample, systematic uncertainties in the modeling of the halo--mass correlation function, halo triaxiality, and projection effects. We discuss prospects for reducing this systematic error budget, which dominates the uncertainty on $M_0$. Our result is in excellent agreement with, but has significantly smaller uncertainties than, previous measurements in the literature, and augurs well for the power of the DES cluster survey as a tool for precision cosmology and upcoming galaxy surveys such as LSST, Euclid and WFIRST.
description: 28 pages, 15 figures; matches MNRAS referee response version