The effect of weak lensing on the angular correlation function of faint galaxies
Abstract
The angular correlation function omicron(theta) of faint galaxies is affected both by non-linear gravitational evolution and by magnification bias resulting from gravitational lensing. We compute the resulting omicron(theta) for different cosmological models and show how its shape and redshift evolution depend on Omega and Lambda. For galaxies at redshift greater than 1 (R magnitude fainter than about 24), magnification bias can significantly enhance or suppress omicron(theta), depending on the slope of the number-magnitude relation. We show, for example, how it changes the ratio of omicron(theta) for two galaxy samples with different number count slopes.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- February 1998
- DOI:
- 10.1046/j.1365-8711.1998.01225.x
- arXiv:
- arXiv:astro-ph/9708271
- Bibcode:
- 1998MNRAS.294..291M
- Keywords:
-
- Angular Correlation;
- Faint Objects;
- Galactic Clusters;
- Cosmology;
- Power Spectra;
- Dark Matter;
- Astrophysics;
- Astrophysics
- E-Print:
- 9 pages, including 5 figures, Latex