Optical galaxy clusters in the Deep Lens Survey

被引：15

作者：

Ascaso, B. ^{[1
,2
]}

Wittman, D. ^{[2
]}

Dawson, W. ^{[2
]}

机构：

[1] Inst Astrofis Andalucia CSIC, E-18008 Granada, Spain

[2] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2014年 / 439卷 / 02期

基金：

美国国家航空航天局;

关键词：

galaxies: clusters: general; galaxies: elliptical and lenticular; cD; galaxies: evolution; cosmology: observations; large-scale structure of Universe; DIGITAL SKY SURVEY; PHOTOMETRIC REDSHIFT ESTIMATION; COLOR-MAGNITUDE RELATION; SHEAR-SELECTED CLUSTERS; ARCHIVE-RESEARCH SURVEY; RAY LUMINOUS CLUSTERS; SIMILAR-TO; COSMOLOGICAL CONSTRAINTS; SPACE-TELESCOPE; OBSERVED GROWTH;

D O I：

10.1093/mnras/stu074

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the first sample of 882 optically selected galaxy clusters in the Deep Lens Survey (DLS), selected with the Bayesian Cluster Finder. We create mock DLS data to assess completeness and purity rates, and find that both are at least 70 per cent within 0.1 < z < 1.2 for clusters with M-200 >= 1.2 x 10(14) M-circle dot. We verified the integrity of the sample by performing several comparisons with other optical, weak lensing, X-ray and spectroscopic surveys which overlap the DLS footprint: the estimated redshifts are consistent with the spectroscopic redshifts of known clusters (for z > 0.25 where saturation in the DLS is not an issue); our richness estimates in combination with a previously calibrated richness-mass relation yield individual cluster mass estimates consistent with available Smithsonian Hectospec Lensing Survey dynamical mass estimates; synthetic mass maps made from the optical mass estimates are correlated (> 3 Sigma significance) with the weak lensing mass maps; and the mass function thus derived is consistent with theoretical predictions for the cold dark matter scenario. With the verified sample, we investigated correlations between the brightest cluster galaxy (BCG) properties and the host cluster properties within a broader range in redshift (0.25 < z < 0.8) and mass (>= 2.4 x 10(14) M-circle dot) than in previous work. We find that the slope of the BCG magnitude-redshift relation throughout this redshift range is consistent with that found at lower redshifts. This result supports an extrapolation to higher redshift of passive evolution of the BCG within the hierarchical scenario.

引用

页码：1980 / 1995

页数：16

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