Weak-lensing mass calibration of redMaPPer galaxy clusters in Dark Energy Survey Science Verification data

Melchior, P. and Gruen, D. and McClintock, T. and Varga, T.~N. and Sheldon, E. and Rozo, E. and Amara, A. and Becker, M.~R. and Benson, B.~A. and Bermeo, A. and Bridle, S.~L. and Clampitt, J. and Dietrich, J.~P. and Hartley, W.~G. and Hollowood, D. and Jain, B. and Jarvis, M. and Jeltema, T. and Kacprzak, T. and MacCrann, N. and Rykoff, E.~S. and Saro, A. and Suchyta, E. and Troxel, M.~A. and Zuntz, J. and Bonnett, C. and Plazas, A.~A. and Abbott, T.~M.~C. and Abdalla, F.~B. and Annis, J. and Benoit-L{_s14e}vy, A. and Bernstein, G.~M. and Bertin, E. and Brooks, D. and Buckley-Geer, E. and Carnero Rosell, A. and Carrasco Kind, M. and Carretero, J. and Cunha, C.~E. and D_s14Andrea, C.~B. and da Costa, L.~N. and Desai, S. and Eifler, T.~F. and Flaugher, B. and Fosalba, P. and Garc{_s14{i}}a-Bellido, J. and Gaztanaga, E. and Gerdes, D.~W. and Gruendl, R.~A. and Gschwend, J. and Gutierrez, G. and Honscheid, K. and James, D.~J. and Kirk, D. and Krause, E. and Kuehn, K. and Kuropatkin, N. and Lahav, O. and Lima, M. and Maia, M.~A.~G. and March, M. and Martini, P. and Menanteau, F. and Miller, C.~J. and Miquel, R. and Mohr, J.~J. and Nichol, R.~C. and Ogando, R. and Romer, A.~K. and Sanchez, E. and Scarpine, V. and Sevilla-Noarbe, I. and Smith, R.~C. and Soares-Santos, M. and Sobreira, F. and Swanson, M.~E.~C. and Tarle, G. and Thomas, D. and Walker, A.~R. and Weller, J. and Zhang, Y.

Keywords

gravitational lensing: weak, galaxies: clusters: general, cosmology: observations

Abstract

We use weak-lensing shear measurements to determine the mean mass of optically selected galaxy clusters in Dark Energy Survey Science Verification data. In a blinded analysis, we split the sample of more than 8000 redMaPPer clusters into 15 subsets, spanning ranges in the richness parameter 5 â‰¤ Î» â‰¤ 180 and redshift 0.2 â‰¤ z â‰¤ 0.8, and fit the averaged mass density contrast profiles with a model that accounts for seven distinct sources of systematic uncertainty: shear measurement and photometric redshift errors_s19 cluster-member contamination_s19 miscentring_s19 deviations from the NFW halo profile_s19 halo triaxiality and line-of-sight projections. We combine the inferred cluster masses to estimate the joint scaling relation between mass, richness and redshift, M(Î» ,z) âˆ M_0 Î» F (1_s16z)G. We find M_0 â‰¡ < M_{200m} | Î» =30,z=0.5 rangle =[ 2.35 Â± 0.22 {(stat)} Â± 0.12 {(sys)} ] Ã— 10^{14} M_{âŠ™}, with F = 1.12 Â± 0.20 {(stat)} Â± 0.06 {(sys)} and G = 0.18 Â± 0.75 {(stat)} Â± 0.24 {(sys)}. The amplitude of the mass-richness relation is in excellent agreement with the weak-lensing calibration of redMaPPer clusters in SDSS by Simet et al. and with the Saro et al. calibration based on abundance matching of SPT-detected clusters. Our results extend the redshift range over which the mass-richness relation of redMaPPer clusters has been calibrated with weak lensing from z â‰¤ 0.3 to z â‰¤ 0.8. Calibration uncertainties of shear measurements and photometric redshift estimates dominate our systematic error budget and require substantial improvements for forthcoming studies.

Weak-lensing mass calibration of redMaPPer galaxy clusters in Dark Energy Survey Science Verification data

Keywords

Abstract

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