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

Obinna Umeh; Kazuya Koyama

doi:10.1088/1475-7516/2019/12/048

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

Obinna Umeh, Kazuya Koyama

Institute of Cosmology & Gravitation

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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 language	English
Article number	048
Number of pages	21
Journal	Journal of Cosmology and Astroparticle Physics
Volume	2019
Issue number	12
DOIs	https://doi.org/10.1088/1475-7516/2019/12/048
Publication status	Published - 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

Access to Document

10.1088/1475-7516/2019/12/048

1907.08094v2
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 KBLicence: CC BY-NC-ND

Data availability statement for 'The galaxy bias at second order in general relativity with Non-Gaussian initial conditions'.
Umeh, O. (Creator) & Koyama, K. (Creator), IOP Publishing, 27 Nov 2019
Dataset

Cosmological Tests of Gravity
Koyama, K.
European Research Council
1/09/15 → 31/08/20
Project: Research

Cite this

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title = "The galaxy bias at second order in general relativity with Non-Gaussian initial conditions",

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. ",

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author = "Obinna Umeh and Kazuya Koyama",

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T1 - The galaxy bias at second order in general relativity with Non-Gaussian initial conditions

AU - Umeh, Obinna

AU - Koyama, Kazuya

PY - 2019/12/16

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N2 - 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.

AB - 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.

KW - astro-ph.CO

KW - gr-qc

KW - RCUK

KW - STFC

KW - ST/N000668/1

KW - ST/K0090X/1

KW - power spectrum

KW - cosmological parameters from LSS

KW - redshift surveys

U2 - 10.1088/1475-7516/2019/12/048

DO - 10.1088/1475-7516/2019/12/048

M3 - Article

SN - 1475-7516

VL - 2019

JO - Journal of Cosmology and Astroparticle Physics

JF - Journal of Cosmology and Astroparticle Physics

IS - 12

M1 - 048

ER -

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

Abstract

Keywords

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Datasets

Data availability statement for 'The galaxy bias at second order in general relativity with Non-Gaussian initial conditions'.

Projects

Cosmological Tests of Gravity

Cite this