Magnification as a Tool in Weak Lensing
arXiv:1009.5590 · doi:10.1103/PhysRevD.84.103004
Abstract
Weak lensing surveys exploit measurements of galaxy ellipticities. These measurements are subject to errors which degrade the cosmological information that can be extracted from the surveys. Here we propose a way of using the galaxy data themselves to calibrate the measurement errors. In particular, the cosmic shear field, which causes the galaxies to appear elliptical, also changes their sizes and fluxes. Information about the sizes and fluxes of the galaxies can be added to the shape information to obtain more robust information about the cosmic shear field. The net result will be tighter constraints on cosmological parameters such as those which describe dark energy.
4 pages, 2 figures
References in corpus (6)
Cited by in corpus (14)
- Growth of Cosmic Structure: Probing Dark Energy Beyond Expansion
- (Mis-)Interpreting supernovae observations in a lumpy universe
- Using CMB lensing to constrain the multiplicative bias of cosmic shear
- Can all cosmological observations be accurately interpreted with a unique geometry?
- The Impact of Magnification and Size Bias on Weak Lensing Power Spectrum and Peak Statistics
- Testing Shear Recovery with Field Distortion
- Size magnification as a complement to Cosmic Shear
- Weak lensing power spectrum reconstruction by counting galaxies.-- I: the ABS method
- Probing Dark Energy with Lensing Magnification in Photometric Surveys
- A method of weak lensing reconstruction through cosmic magnification with multi-band photometry information
- Systematic tests for position-dependent additive shear bias
- Weak Lensing Mass Calibration with Shear and Magnification
- Modelling the impact of intrinsic size and luminosity correlations on magnification estimation
- Diagnosing multiplicative error by lensing magnification of type Ia supernovae