Cosmic magnification: nulling the intrinsic clustering signal
arXiv:1101.3337 · doi:10.1111/j.1365-2966.2011.18816.x
Abstract
We investigate the extent to which the pure magnification effect of gravitational lensing can be extracted from galaxy clustering statistics, by a nulling method which aims to eliminate terms arising from the intrinsic clustering of galaxies. The aim is to leave statistics which are free from the uncertainties of galaxy bias. We find that nulling can be done effectively, leaving data which are relatively insensitive to uncertainties in galaxy bias and its evolution, leading to cosmological parameter estimation which is effectively unbiased. This advantage comes at the expense of increased statistical errors, which are in some cases large, but it offers a robust alternative analysis method to cosmic shear for cosmological imaging surveys designed for weak lensing studies, or to full modelling of the clustering signal including magnification effects.
11 pages, 6 figures. Accepted by MNRAS
References in corpus (11)
- Cosmology with Weak Lensing Surveys
- PHAT: PHoto-z Accuracy Testing
- Simultaneous measurement of cosmology and intrinsic alignments using joint cosmic shear and galaxy number density correlations
- Systematic Bias in Cosmic Shear: Beyond the Fisher Matrix
- Probing dark energy with the shear-ratio geometric test
- The removal of shear-ellipticity correlations from the cosmic shear signal via nulling techniques
- Shape measurement biases from underfitting and ellipticity gradients
- CARS: The CFHTLS-Archive-Research Survey III. First detection of cosmic magnification in samples of normal high-z galaxies
- Shear and Magnification: Cosmic Complementarity
- Complete Treatment of Galaxy Two-Point Statistics: Gravitational Lensing Effects and Redshift-Space Distortions
- The galaxy-galaxy lensing contribution to the cosmic shear two point function
Cited by in corpus (18)
- The Intrinsic Alignment of Galaxies and its Impact on Weak Gravitational Lensing in an Era of Precision Cosmology
- On using angular cross-correlations to determine source redshift distributions
- On the complementarity of galaxy clustering with cosmic shear and flux magnification
- Inferring the mass of sub-millimetre galaxies by exploiting their gravitational magnification of background galaxies
- CFHTLenS and RCSLenS: Testing Photometric Redshift Distributions Using Angular Cross-Correlations with Spectroscopic Galaxy Surveys
- Euclid preparation: XIX. Impact of magnification on photometric galaxy clustering
- Detection of Enhancement in Number Densities of Background Galaxies due to Magnification by Massive Galaxy Clusters
- Observational biases in flux magnification measurements
- Angular ellipticity correlations in a composite alignment model for elliptical and spiral galaxies and inference from weak lensing
- Measuring the Geometry of the Universe from Weak Gravitational Lensing behind Galaxy Groups in the HST COSMOS survey
- Probing early structure and model-independent neutrino mass with high-redshift CMB lensing mass maps
- Large-scale imprint of relativistic effects in the cosmic magnification
- Anisotropic Halo Model
- Statistical separation of weak gravitational lensing and intrinsic ellipticities based on galaxy colour information
- Probing Dark Energy with Lensing Magnification in Photometric Surveys
- UNIONS: a direct measurement of intrinsic alignment with BOSS/eBOSS spectroscopy
- Science-driven 3D data compression
- Understanding the relativistic overdensity of galaxy surveys