μ⋆ masses: weak-lensing calibration of the Dark Energy Survey Year 1 redMaPPer 
clusters using stellar masses

Pereira, M. E. S.; Palmese, A.; Varga, T. N.; McClintock, T.; Soares-Santos, M.; Burgad, J.; Annis, J.; Farahi, A.; Lin, H.; Choi, A.; DeRose, J.; Esteves, J.; Gatti, M.; Gruen, D.; Hartley, W. G.; Hoyle, B.; Jeltema, T.; MacCrann, N.; Roodman, A.; Sanchez, C.; Shin, T.; von der Linden, A.; Zuntz, J.; Abbott, T. M. C.; Aguena, M.; Avila, S.; Bertin, E.; Bhargava, S.; Bridle, S. L.; Brooks, D.; Burke, D. L.; Rosell, A. Carnero; Kind, M. Carrasco; Carretero, J.; Costanzi, M.; da Costa, L. N.; Desai, S.; Diehl, H. T.; Dietrich, J. P.; Doel, P.; Estrada, J.; Everett, S.; Flaugher, B.; Fosalba, P.; Frieman, J.; Garcia-Bellido, J.; Gaztanaga, E.; Gerdes, D. W.; Gruendl, R. A.; Gschwend, J.; Gutierrez, G.; Hinton, S. R.; Hollowood, D. L.; Honscheid, K.; James, D. J.; Kuehn, K.; Kuropatkin, N.; Lahav, O.; Lima, M.; Maia, M. A. G.; March, M.; Marshall, J. L.; Melchior, P.; Menanteau, F.; Miquel, R.; Ogando, R. L. C.; Paz-Chinchon, F.; Plazas, A. A.; Romer, A. K.; Sanchez, E.; Scarpine, V.; Schubnell, M.; Serrano, S.; Sevilla-Noarbe, I.; Smith, M.; Suchyta, E.; Swanson, M. E. C.; Tarle, G.; Wechsler, R. H.; Weller, J.; Zhang, Y.

doi:10.1093/mnras/staa2687

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μ⋆ masses: weak-lensing calibration of the Dark Energy Survey Year 1 redMaPPer clusters using stellar masses

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Varga, T. N.
Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

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Hoyle, B.
Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

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Citation

Pereira, M. E. S., Palmese, A., Varga, T. N., McClintock, T., Soares-Santos, M., Burgad, J., et al. (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), 5450-5467. doi:10.1093/mnras/staa2687.

Cite as: https://hdl.handle.net/21.11116/0000-0007-FCE4-C

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 ⟨M_200c|μ⋆,z⟩=M₀(μ⋆/5.16×10¹²M_⊙)^{F^μ⋆}((1+z)/1.35)^{G^z}⁠. We find M₀=(1.14±0.07)×10¹⁴M_⊙ with F_μ⋆=0.76±0.06 and G_z = −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.