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Cosmological information in the redshift-space bispectrum

Yankelevich, V and Porciani, C (2018) Cosmological information in the redshift-space bispectrum. Monthly Notices of the Royal Astronomical Society, 483 (2). pp. 2078-2099. ISSN 0035-8711

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Abstract

We use the Fisher-matrix formalism to investigate whether the galaxy bispectrum in redshift space, B, contains additional cosmological information with respect to the power spectrum, P. We focus on a Euclid-like survey and consider cosmological models dominated by dark energy and cold dark matter with Gaussian primordial perturbations. After discussing the phenomenology of redshift-space distortions for the bispectrum, we derive an expression for the cross-covariance between B and P at leading order in perturbation theory. Our equation generalizes previous results that did not consider binning in the orientation of wavevector triangles with respect to the line of sight. By considering Fourier modes with wavenumber

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2018 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: 0201 Astronomical and Space Sciences
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press
Related URLs:
Date Deposited: 06 May 2020 10:49
Last Modified: 06 May 2020 11:00
DOI or Identification number: 10.1093/mnras/sty3143
URI: http://researchonline.ljmu.ac.uk/id/eprint/12891

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