Modelling projection effects in optically selected cluster catalogues

被引：61

作者：

Costanzi, M. ^{[1
]}

Rozo, E. ^{[2
]}

Rykoff, E. S. ^{[3
,4
]}

Farahi, A. ^{[5
]}

Jeltema, T. ^{[6
]}

Evrard, A. E. ^{[6
]}

Mantz, A. ^{[3
,7
]}

Gruen, D. ^{[3
,4
]}

Mandelbaum, R. ^{[8
]}

DeRose, J. ^{[3
,7
]}

McClintock, T. ^{[2
]}

Varga, T. N. ^{[1
,9
]}

Zhang, Y. ^{[1
,10
]}

Weller, J. ^{[1
,9
,11
]}

Wechsler, R. H. ^{[3
,4
,7
]}

Aguena, M. ^{[12
]}

机构：

[1] Ludwig Maximilians Univ Munchen, Fak Phys, Univ Sternwarte, Scheiner Str 1, D-81679 Munich, Germany

[2] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA

[3] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, POB 2450, Stanford, CA 94305 USA

[4] SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA

[5] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

[6] Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA

[7] Stanford Univ, Dept Phys, 382 Via Pueblo Mall, Stanford, CA 94305 USA

[8] Carnegie Mellon Univ, Dept Phys, McWilliams Ctr Cosmol, Pittsburgh, PA 15213 USA

[9] Max Planck Inst Extraterr Phys, Giessenbachstr, D-85748 Garching, Germany

[10] Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA

[11] Excellence Cluster Universe, Boltzmann Str 2, D-85748 Garching, Germany

[12] Lab Interinst & Astron LineA, Rua Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2019年 / 482卷 / 01期

基金：

美国国家科学基金会; 欧洲研究理事会; 英国科学技术设施理事会; 澳大利亚研究理事会;

关键词：

galaxies: clusters: general; large-scale structure of Universe; ASSEMBLY BIAS; REDMAPPER; GALAXIES;

D O I：

10.1093/mnras/sty2665

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The cosmological utility of galaxy cluster catalogues is primarily limited by our ability to calibrate the relation between halo mass and observable mass proxies such as cluster richness, X-ray luminosity, or the Sunyaev-Zeldovich signal. Projection effects are a particularly pernicious systematic effect that can impact observable mass proxies; structure along the line of sight can both bias and increase the scatter of the observable mass proxies used in cluster abundance studies. In this work, we develop an empirical method to characterize the impact of projection effects on redMaPPer cluster catalogues. We use numerical simulations to validate our method and illustrate its robustness. We demonstrate that modelling of projection effects is a necessary component for cluster abundance studies capable of reaching mass calibration uncertainties (e.g. the Dark Energy Survey Year 1 sample). Specifically, ignoring the impact of projection effects in the observable-mass relation - i.e. marginalizing over a lognormal model only - biases the posterior probability of the cluster normalization condition S-8 = 0.05, more than twice the uncertainty in the posterior for such an analysis.

引用

页码：490 / 505

页数：16

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