Imprints of local lightcone \ projection effects on the galaxy bispectrum. Part II

Sheean Jolicoeur, Obinna Umeh, Roy Maartens, Chris Clarkson

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General relativistic imprints on the galaxy bispectrum arise from observational (or projection) effects. The lightcone projection effects include local contributions from Doppler and gravitational potential terms, as well as lensing and other integrated contributions. We recently presented for the first time, the correction to the galaxy bispectrum from all local lightcone projection effects up to second order in perturbations. Here we provide the details underlying this correction, together with further results and illustrations. For moderately squeezed shapes, the correction to the Newtonian prediction is ~30% on equality scales at z ~ 1. We generalise our recent results to include the contribution, up to second order, of magnification bias (which affects some of the local terms) and evolution bias.
Original languageEnglish
Article number040
Pages (from-to)1-26
Number of pages26
JournalJournal of Cosmology and Astroparticle Physics
Publication statusPublished - 28 Sept 2017


  • astro-ph.CO
  • gr-qc
  • RCUK
  • STFC
  • ST/P000592/1
  • ST/N000668/1
  • cosmological parameters from LSS
  • galaxy surveys
  • redshift surveys


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