Tomographic Magnification of Lyman Break Galaxies in The Deep Lens Survey
arXiv:1204.2830 · doi:10.1111/j.1365-2966.2012.21826.x
Abstract
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 S/N 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 7 redshift bins. Combining galaxy-magnification cross-correlations and galaxy angular auto-correlations, 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 > 7.5σ with a fixed σ_8 and is found to be consistent with the expected redshift-dependence of the WMAP7 ΛCDM cosmology.
12 pages, 9 figures, Accepted to MNRAS
References in corpus (10)
- Why your model parameter confidences might be too optimistic -- unbiased estimation of the inverse covariance matrix
- Galaxy Evolution from Halo Occupation Distribution Modeling of DEEP2 and SDSS Galaxy Clustering
- Galaxies in the Hubble Ultra Deep Field: I. Detection, Multiband Photometry, Photometric Redshifts, and Morphology
- Calibrating Redshift Distributions Beyond Spectroscopic Limits with Cross-Correlations
- A Detection of Weak Lensing Magnification using Galaxy Sizes and Magnitudes
- COSMOS: Stochastic bias from measurements of weak lensing and galaxy clustering
- What Lies Beneath: Using p(z) to Reduce Systematic Photometric Redshift Errors
- GaBoDS: The Garching-Bonn Deep Survey: VII. Probing galaxy bias using weak gravitational lensing
- Improving Correlation Function Fitting with Ridge Regression: Application to Cross-Correlation Reconstruction
- An Improved Photometric Calibration of the Sloan Digital Sky Survey Imaging Data
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