Modelling the impact of intrinsic size and luminosity correlations on magnification estimation
arXiv:1607.08784 · doi:10.1093/mnras/stw2052
Abstract
Spatial correlations of the observed sizes and luminosities of galaxies can be used to estimate the magnification that arises through weak gravitational lensing. However, the intrinsic prop- erties of galaxies can be similarly correlated through local physical effects, and these present a possible contamination to the weak lensing estimation. In an earlier paper (Ciarlariello et al. 2015) we modelled the intrinsic size correlations using the halo model, assuming the galaxy sizes reflect the mass in the associated halo. Here we extend this work to consider galaxy magnitudes and show that these may be even more affected by intrinsic correlations than galaxy sizes, making this a bigger systematic for measurements of the weak lensing signal. We also quantify how these intrinsic correlations are affected by sample selection criteria based on sizes and magnitudes.
arXiv comment17 pages, 12 figures, 1 table; published on MNRAS
References in corpus (39)
- The Structure of Cold Dark Matter Halos
- Planck 2013 results. XVI. Cosmological parameters
- Large scale bias and the peak background split
- Baryonic Features in the Matter Transfer Function
- Stable clustering, the halo model and nonlinear cosmological power spectra
- Halo Models of Large Scale Structure
- Revising the Halofit Model for the Nonlinear Matter Power Spectrum
- CFHTLenS tomographic weak lensing cosmological parameter constraints: Mitigating the impact of intrinsic galaxy alignments
- Detection of weak gravitational lensing distortions of distant galaxies by cosmic dark matter at large scales
- Detection of Weak Gravitational Lensing by Large-scale Structure
- Dark energy constraints from cosmic shear power spectra: impact of intrinsic alignments on photometric redshift requirements
- Gravitational Lensing Analysis of the Kilo Degree Survey
- Power Spectrum Tomography with Weak Lensing
- The size - virial radius relation of galaxies
- The Intrinsic Alignment of Galaxies and its Impact on Weak Gravitational Lensing in an Era of Precision Cosmology
- Detection of Cosmic Magnification with the Sloan Digital Sky Survey
- The Galaxy Content of SDSS Clusters and Groups
- A halo model for intrinsic alignments of galaxy ellipticities
- The Cosmological Impact of Intrinsic Alignment Model Choice for Cosmic Shear
- Anisotropic Magnification Distortion of the 3D Galaxy Correlation: I. Real Space
- CARS: The CFHTLS-Archive-Research Survey III. First detection of cosmic magnification in samples of normal high-z galaxies
- A Detection of Weak Lensing Magnification using Galaxy Sizes and Magnitudes
- Halo model description of the non-linear dark matter power spectrum at Mpc
- Inferring the mass of sub-millimetre galaxies by exploiting their gravitational magnification of background galaxies
- Cosmology with Doppler Lensing
- Size Bias in Galaxy Surveys
- Shear and Magnification: Cosmic Complementarity
- Substructure and the halo model of large-scale structure
- Lensing Magnification: A novel method to weigh high-redshift clusters and its application to SpARCS
- Magnification by Galaxy Group Dark Matter Halos
- Weak Lensing with Sizes, Magnitudes and Shapes
- Combining Size and Shape in Weak Lensing
- Magnification of Photometric LRGs by Foreground LRGs and Clusters in SDSS
- Detection of spatial correlations of fundamental plane residuals, and cosmological implications
- Size magnification as a complement to Cosmic Shear
- Magnification as a Tool in Weak Lensing
- Cluster mass profile reconstruction with size and flux magnification on the HST STAGES survey
- Small-scale Gradients of Charged Particles in the Heliospheric Magnetic Field
- Intrinsic size correlations in weak lensing