Size Bias in Galaxy Surveys
arXiv:0904.4702 · doi:10.1103/PhysRevLett.103.051301
Abstract
Only certain galaxies are included in surveys: those bright and large enough to be detectable as extended sources. Because gravitational lensing can make galaxies appear both brighter and larger, the presence of foreground inhomogeneities can scatter galaxies across not only magnitude cuts but also size cuts, changing the statistical properties of the resulting catalog. Here we explore this size bias, and how it combines with magnification bias to affect galaxy statistics. We demonstrate that photometric galaxy samples from current and upcoming surveys can be even more affected by size bias than by magnification bias.
4 pages; 3 figures. Accepted for publication in Phys. Rev. Let.; v2: incorporating referee's comments; v3: updated acknowledgments
References in corpus (9)
- The Great Observatories Origins Deep Survey: Initial Results From Optical and Near-Infrared Imaging
- Shear calibration biases in weak lensing surveys
- Anisotropic Magnification Distortion of the 3D Galaxy Correlation: I. Real Space
- Reduced Shear Power Spectrum
- Biased Dark Energy Constraints from Neglecting Reduced Shear in Weak Lensing Surveys
- The Gravitational Lensing in Redshift-space Correlation Functions of Galaxies and Quasars
- Magnification effects as measures of large-scale structure
- Weak Lensing Effects on the Galaxy Three-Point Correlation Function
- Weak Lensing of Baryon Acoustic Oscillations
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- An Analysis of DES Cluster Simulations through the IMCAT and Shapelets Weak Lensing Pipelines
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