Melchior, P;
Gruen, D;
McClintock, T;
Varga, TN;
Sheldon, E;
Rozo, E;
Amara, A;
... Zhang, Y; + view all
(2017)
Weak-lensing mass calibration of redMaPPer galaxy clusters in Dark Energy Survey Science Verification data.
Monthly Notices of the Royal Astronomical Society
, 469
(4)
10.1093/mnras/stx1053.
Preview |
Text
Abdalla_stx1053.pdf - Published Version Download (2MB) | Preview |
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 ≤ λ ≤ 180 and redshift 0.2 ≤ z ≤ 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; miscentring; 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, M(λ,z)∝M0λF(1+z)G M(λ,z)∝M0λF(1+z)G . We find M0≡⟨M200m|λ=30,z=0.5⟩=[2.35±0.22 (stat)±0.12 (sys)]× 1014 M⊙ M0≡⟨M200m|λ=30,z=0.5⟩=[2.35±0.22 (stat)±0.12 (sys)]× 1014 M⊙ , with F=1.12±0.20 (stat)±0.06 (sys) F=1.12±0.20 (stat)±0.06 (sys) and G=0.18±0.75 (stat)±0.24 (sys) G=0.18±0.75 (stat)±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 ≤ 0.3 to z ≤ 0.8. Calibration uncertainties of shear measurements and photometric redshift estimates dominate our systematic error budget and require substantial improvements for forthcoming studies.
| Type: | Article |
|---|---|
| Title: | Weak-lensing mass calibration of redMaPPer galaxy clusters in Dark Energy Survey Science Verification data |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stx1053 |
| Publisher version: | https://doi.org/10.1093/mnras/stx1053 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | gravitational lensing: weak, galaxies: clusters: general, cosmology: observations |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1540499 |
Archive Staff Only
 |
View Item |
