Weak lensing effects on the galaxy three-point correlation function
- Department of Astronomy and Astrophysics, University of Chicago, Chicago, Illinois 60637-1433 (United States)
- Institute d'Astrophysique de Paris, CNRS-UMR 7095, Universite Paris VI Pierre et Marie Curie, 98bis, bd Arago - F-75014 Paris (France)
- Particle Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510-0500 (United States)
We study the corrections to the galaxy three-point correlation function induced by weak lensing magnification due to the matter distribution along the line of sight. We consistently derive all the correction terms arising up to second order in perturbation theory and provide analytic expressions as well as order-of-magnitude estimates for their relative importance. The magnification contributions depend on the geometry of the projected triangle on the sky plane and scale with different powers of the number count slope and redshift of the galaxy sample considered. We evaluate all terms numerically and show that, depending on the triangle configuration as well as the galaxy sample considered, weak lensing can in general significantly contribute to and alter the three-point correlation function observed through galaxy and quasar catalogs.
- OSTI ID:
- 21250461
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 78, Issue 4; Other Information: DOI: 10.1103/PhysRevD.78.043513; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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