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

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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
Issue number12
Publication statusPublished - 16 Dec 2019


  • 1907.08094v2

    Rights statement: This Accepted Manuscript is available for reuse under a CC BY-NC-ND 3.0 licence after the 12 month embargo period provided that all the terms of the licence are adhered to.

    Accepted author manuscript (Post-print), 529 KB, PDF document

    Licence: CC BY-NC-ND

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