The galaxy bias at second order in general relativity with Non-Gaussian initial conditions

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Abstract

We present a systematic study of galaxy bias in the presence of primordial non-Gaussianity in General Relativity (GR) at second order in perturbation theory. The non-linearity of the Poisson equation in GR and primordial non-Gaussianity are consistently included. We show that the inclusion of non-local primordial non-Gaussianity in addition to local non-Gaussianity is important to show the absence of the modulation of small scale clustering by the long-wavelength mode in the single field slow-roll inflation. We study the bispectrum of the relativistic galaxy density in several gauges and identify the effect of primordial non-Gaussianity and GR corrections.
Original languageEnglish
Article number048
Number of pages21
JournalJournal of Cosmology and Astroparticle Physics
Volume2019
Issue number12
DOIs
Publication statusPublished - 16 Dec 2019

Keywords

  • astro-ph.CO
  • gr-qc
  • RCUK
  • STFC
  • ST/N000668/1
  • ST/K0090X/1
  • power spectrum
  • cosmological parameters from LSS
  • redshift surveys

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