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Title: Observed galaxy number counts on the lightcone up to second order: I. Main result

We present the galaxy number overdensity up to second order in redshift space on cosmological scales for a concordance model. The result contains all general relativistic effects up to second order that arise from observing on the past light cone, including all redshift effects, lensing distortions from convergence and shear, and contributions from velocities, Sachs-Wolfe, integrated SW and time-delay terms. This result will be important for accurate calculation of the bias on estimates of non-Gaussianity and on precision parameter estimates, introduced by nonlinear projection effects.
Authors:
;  [1] ;  [2]
  1. Physics Department, University of the Western Cape, Cape Town 7535 (South Africa)
  2. Centre for Astrophysics, Cosmology and Gravitation, and, Department of Mathematics and Applied Mathematics, University of Cape Town, Cape Town 7701 (South Africa)
Publication Date:
OSTI Identifier:
22375868
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 09; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCURACY; CONVERGENCE; GALAXIES; LIGHT CONE; NONLINEAR PROBLEMS; RED SHIFT; RELATIVISTIC RANGE; TIME DELAY