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

Daniele Bertacca*, Roy Maartens, Chris Clarkson

*Corresponding author for this work

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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.

Original languageEnglish
Article number037
Pages (from-to)037
JournalJournal of Cosmology and Astroparticle Physics
Issue number9
Early online date23 Sept 2014
Publication statusPublished - Sept 2014


  • cosmic ows
  • cosmic web
  • cosmological perturbation theory
  • gravity
  • RCUK
  • STFC
  • ST/K0090X/1


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