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29 March 2024
 
  » arxiv » 1610.6890

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Weak-lensing mass calibration of redMaPPer galaxy clusters in Dark Energy Survey Science Verification data
P. Melchior ; D. Gruen ; T. McClintock ; T. N. Varga ; E. Sheldon ; E. Rozo ; A. Amara ; M. R. Becker ; B. A. Benson ; A. Bermeo ; S. L. Bridle ; J. Clampitt ; J. P. Dietrich ; W. G. Hartley ; D. Hollowood ; B. Jain ; M. Jarvis ; T. Jeltema ; T. Kacprzak ; N. MacCrann ; E. S. Rykoff ; A. Saro ; E. Suchyta ; M. A. Troxel ; J. Zuntz ; C. Bonnett ; A. A. Plazas ; T. M. C. Abbott ; F. B. Abdalla ; J. Annis ; A. Benoit-Lévy ; G. M. Bernstein ; E. Bertin ; D. Brooks ; E. Buckley-Geer ; A. Carnero Rosell ; M. Carrasco Kind ; J. Carretero ; C. E. Cunha ; C. B. D'Andrea ; L. N. da Costa ; S. Desai ; T. F. Eifler ; B. Flaugher ; P. Fosalba ; J. García-Bellido ; E. Gaztanaga ; D. W. Gerdes ; R. A. Gruendl ; J. Gschwend ; G. Gutierrez ; K. Honscheid ; D. J. James ; D. Kirk ; E. Krause ; K. Kuehn ; N. Kuropatkin ; O. Lahav ; M. Lima ; M. A. G. Maia ; M. March ; P. Martini ; F. Menanteau ; C. J. Miller ; R. Miquel ; J. J. Mohr ; R. C. Nichol ; R. Ogando ; A. K. Romer ; E. Sanchez ; V. Scarpine ; I. Sevilla-Noarbe ; R. C. Smith ; M. Soares-Santos ; F. Sobreira ; M. E. C. Swanson ; G. Tarle ; D. Thomas ; A. R. Walker ; J. Weller ; Y. Zhang ;
Date 21 Oct 2016
AbstractWe 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 8,000 redMaPPer clusters into 15 subsets, spanning ranges in the richness parameter $5 leq lambda leq 180$ and redshift $0.2 leq z leq 0.8$, 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; cluster-member contamination; miscentering; deviations from the NFW halo profile; halo triaxiality; and line-of-sight projections. We combine the inferred cluster masses to estimate the joint scaling relation between mass, richness and redshift, $mathcal{M}(lambda,z) varpropto M_0 lambda^{F} (1+z)^{G}$. We find $M_0 equiv langle M_{200mathrm{m}},|,lambda=30,z=0.5 angle=left[ 2.35 pm 0.22 m{(stat)} pm 0.12 m{(sys)} ight] cdot 10^{14} M_odot$, with $F = 1.12,pm,0.20 m{(stat)}, pm, 0.06 m{(sys)}$ and $G = 0.18,pm, 0.75 m{(stat)}, pm, 0.24 m{(sys)}$. 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. (2016) and with the Saro et al. (2015) 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 $zleq 0.3$ to $zleq0.8$. Calibration uncertainties of shear measurements and photometric redshift estimates dominate our systematic error budget and require substantial improvements for forthcoming studies.
Source arXiv, 1610.6890
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