Cited by 61Cosmology and Gravitation TheoriesGalaxies: Formation, Evolution, PhenomenaDark Matter and Cosmic Phenomena

Curvature constraints from large scale structure

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Dio, Enea Di, Montanari, Francesco, Raccanelli, Alvise, Durrer, Ruth, Kamionkowski, Marc, Lesgourgues, Julien·2016·Journal of Cosmology and Astroparticle Physics

Abstract

We modified the CLASS code in order to include relativistic galaxy number counts in spatially curved geometries; we present the formalism and study the effect of relativistic corrections on spatial curvature. The new version of the code is now publicly available. Using a Fisher matrix analysis, we investigate how measurements of the spatial curvature parameter Ω K with future galaxy surveys are affected by relativistic effects, which influence observations of the large scale galaxy distribution. These effects include contributions from cosmic magnification, Doppler terms and terms involving the gravitational potential. As an application, we consider angle and redshift dependent power spectra, which are especially well suited for model independent cosmological constraints. We compute our results for a representative deep, wide and spectroscopic survey, and our results show the impact of relativistic corrections on spatial curvature parameter estimation. We show that constraints on the curvature parameter may be strongly biased if, in particular, cosmic magnification is not included in the analysis. Other relativistic effects turn out to be subdominant in the studied configuration. We analyze how the shift in the estimated best-fit value for the curvature and other cosmological parameters depends on the magnification bias parameter, and find that significant biases are to be expected if this term is not properly considered in the analysis.

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  1. Planck collaboration, P.A.R. Ade et al., Planck 2015 results. XIII. Cosmological parameters, arXiv:1502.01589 [INSPIRE]. · arXiv
  2. SKA Cosmology SWG collaboration, R. Maartens et al., Overview of cosmology with the SKA, PoS(AASKA14)016 [arXiv:1501.04076] [INSPIRE]. · arXiv
  3. A. Raccanelli, D. Bertacca, R. Maartens, C. Clarkson and O. Doré, Lensing and time-delay contributions to galaxy correlations, arXiv:1311.6813 [INSPIRE]. · arXiv
  4. D. Jeong, F. Schmidt and C.M. Hirata, Large-scale clustering of galaxies in general relativity, Phys. Rev. D 85 (2012) 023504 [arXiv:1107.5427] [INSPIRE]. · DOI

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Authors
Dio, E. D., Montanari, F., Raccanelli, A., Durrer, R., Kamionkowski, M., & Lesgourgues, J.
Affiliations
  • Trieste Astronomical Observatory (IT)
  • University of Geneva (CH)
  • Johns Hopkins University (US)
Venue
Journal of Cosmology and Astroparticle Physics
Published
2016-06-07
Volume
2016
Issue
06
Pages
013-013
ISSN
  • 1475-7508 (ISSN-L)
  • 1475-7516
OpenAlex
W2317251229
Cited by
61
References
128
Citations by year
2026: 3 · 2025: 4 · 2024: 4 · 2023: 3 · 2022: 8 · 2021: 8 · 2020: 8 · 2019: 6 · 2018: 11 · 2017: 5 · 2016: 1
FWCI
3.67
Type
journal article
Language
en
Open access
Locations
  • Journal of Cosmology and Astroparticle Physics (publishedVersion)
  • arXiv (Cornell University) (acceptedVersion)
  • RWTH Publications (RWTH Aachen) (submittedVersion)
  • Padua Research Archive (University of Padova) (submittedVersion)
  • arXiv (Cornell University)
Funders
  • National Science Foundation (0244990)
  • National Aeronautics and Space Administration (NASA NNX15AB18G, NNX15AB18G)
  • John Templeton Foundation
  • Johns Hopkins University (0244990)
  • Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
  • Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Dark Matter and Cosmic Phenomena
Keywords
spatial curvature, relativistic corrections, galaxy number counts, CLASS code, cosmic magnification, magnification bias, gravitational potential, large-scale structure, Fisher matrix analysis, cosmological parameter estimation, spectroscopic survey

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