Tomographic magnification of Lyman-break galaxies in the Deep Lens Survey

被引：36

作者：

Morrison, C. B. ^{[1
]}

Scranton, R. ^{[1
]}

Menard, B. ^{[2
,3
]}

Schmidt, S. J. ^{[1
]}

Tyson, J. A. ^{[1
]}

Ryan, R. ^{[4
]}

Choi, A. ^{[5
]}

Wittman, D. M. ^{[1
]}

机构：

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

[2] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD USA

[3] Univ Tokyo, Inst Phys & Math Universe, Kashiwa, Chiba 2778583, Japan

[4] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[5] Univ Edinburgh, Royal Observ, Inst Astron, Scottish Univ Phys Alliance, Edinburgh EH9 3HJ, Midlothian, Scotland

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2012年 / 426卷 / 03期

基金：

美国国家科学基金会; 欧洲研究理事会;

关键词：

gravitational lensing: weak; galaxies: haloes; galaxies: high-redshift; cosmology: observations; large-scale structure of Universe; HALO OCCUPATION DISTRIBUTION; CFHT LEGACY SURVEY; LUMINOSITY FUNCTION; PHOTOMETRIC REDSHIFTS; COSMIC MAGNIFICATION; MODEL; BIAS; EVOLUTION; CLUSTERS; SHEAR;

D O I：

10.1111/j.1365-2966.2012.21826.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using about 450?000 galaxies in the Deep Lens Survey, we present a detection of the gravitational magnification of z > 4 Lyman-break galaxies by massive foreground galaxies with 0.4 < z < 1.0, grouped by redshift. The magnification signal is detected at a signal-to-noise ratio greater than 20, and rigorous checks confirm that it is not contaminated by any galaxy sample overlap in redshift. The inferred galaxy mass profiles are consistent with earlier lensing analyses at lower redshift. We then explore the tomographic lens magnification signal by splitting our foreground galaxy sample into seven redshift bins. Combining galaxy-magnification cross-correlations and galaxy angular autocorrelations, we develop a bias-independent estimator of the tomographic signal. As a diagnostic of magnification tomography, the measurement of this estimator rejects a flat, dark matter-dominated universe at >7.5s with a fixed s8 and is found to be consistent with the expected redshift dependence of the Wilkinson Microwave Anisotropy Probe 7 ? cold dark matter cosmology.

引用

页码：2489 / 2499

页数：11

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