Simultaneous measurement of cosmology and intrinsic alignments using joint cosmic shear and galaxy number density correlations

2009/11/30 by B. Joachimi, S. L. Bridle · 1 citation
Physics and Astronomy · #Astronomy and Astrophysical Research #COSMIC cancer database #Cosmology #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy cluster #Galaxy formation and evolution #Observational cosmology #Redshift #astro-ph.CO

paper · pdf · doi:10.1051/0004-6361/200913657

published as Astron.Astrophys.523:A1,2010 · 22 pages, 10 figures; extended discussion, otherwise minor changes to match accepted version; published in Astronomy and Astrophysics

openalex publication_date 2010/08/12 · arxiv created 2010/11/29 · arxiv updated 2015/05/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Aims. Cosmic shear is a powerful method to constrain cosmology, provided that any systematic effects are under control. The intrinsic alignment of galaxies is expected to severely bias parameter estimates if not taken into account. We explore the potential of a joint analysis of tomographic galaxy ellipticity, galaxy number density, and ellipticity-number density cross-correlations to simultaneously constrain cosmology and self-calibrate unknown intrinsic alignment and galaxy bias contributions.

Citations

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Cited by

• Defining a weak lensing experiment in space