Pereira, MES;
Palmese, A;
Varga, TN;
McClintock, T;
Soares-Santos, M;
Burgad, J;
Annis, J;
... Zhang, Y; + view all
(2020)
μ⋆ masses: weak-lensing calibration of the Dark Energy Survey Year 1 redMaPPer clusters using stellar masses.
Monthly Notices of the Royal Astronomical Society
, 498
(4)
pp. 5450-5467.
10.1093/mnras/staa2687.
Preview |
Text
staa2687.pdf - Published Version Download (2MB) | Preview |
Abstract
We present the weak-lensing mass calibration of the stellar-mass-based μ⋆ mass proxy for redMaPPer galaxy clusters in the Dark Energy Survey Year 1. For the first time, we are able to perform a calibration of μ⋆ at high redshifts, z > 0.33. In a blinded analysis, we use ∼6000 clusters split into 12 subsets spanning the ranges 0.1 ≤ z < 0.65 and μ⋆ up to ∼5.5×1013M⊙, and infer the average masses of these subsets through modelling of their stacked weak-lensing signal. In our model, we account for the following sources of systematic uncertainty: shear measurement and photometric redshift errors, miscentring, cluster-member contamination of the source sample, deviations from the Navarro–Frenk–White halo profile, halo triaxiality, and projection effects. We use the inferred masses to estimate the joint mass–μ⋆–z scaling relation given by ⟨M200c|μ⋆,z⟩=M0(μ⋆/5.16×1012M⊙)Fμ⋆((1+z)/1.35)Gz. We find M0=(1.14±0.07)×1014M⊙ with Fμ⋆=0.76±0.06 and Gz = −1.14 ± 0.37. We discuss the use of μ⋆ as a complementary mass proxy to the well-studied richness λ for: (i) exploring the regimes of low z, λ < 20 and high λ, z ∼ 1; and (ii) testing systematics such as projection effects for applications in cluster cosmology.
| Type: | Article |
|---|---|
| Title: | μ⋆ masses: weak-lensing calibration of the Dark Energy Survey Year 1 redMaPPer clusters using stellar masses |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/staa2687 |
| Publisher version: | http://dx.doi.org/10.1093/mnras/staa2687 |
| 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, GIANT BRANCH STARS, GALAXY CLUSTERS, HALO MASS, SCALING RELATIONS, COSMOLOGICAL PARAMETERS, RICHNESS RELATION, X-RAY, MATTER, EVOLUTION, MODEL |
| 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/10117090 |
Archive Staff Only
 |
View Item |
