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Biases on cosmological parameters by general relativity effects

L. Lopez-Honorez1, O. Mena2, and S. Rigolin3

  • 1Service de Physique Théorique, Université Libre de Bruxelles, Brussels, Belgium
  • 2IFIC-CSIC and Universidad de Valencia, Valencia, Spain
  • 3Dipartimento di Fisica, Università di Padova and INFN Padova, Padova, Italy

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Phys. Rev. D 85, 023511 – Published 9 January, 2012

DOI: https://doi.org/10.1103/PhysRevD.85.023511

Abstract

General relativistic corrections to the galaxy power spectrum appearing at the horizon scale, if neglected, may induce biases on the measured values of the cosmological parameters. In this paper, we study the impact of general relativistic effects on non standard cosmologies such as scenarios with a time dependent dark energy equation of state, with a coupling between the dark energy and the dark matter fluids or with non-Gaussianities. We then explore whether general relativistic corrections affect future constraints on cosmological parameters in the case of a constant dark energy equation of state and of non-Gaussianities. We find that relativistic corrections on the power spectrum are not expected to affect the foreseen errors on the cosmological parameters nor to induce large biases on them.

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Phys. Rev. D 85, 023511– Published 9 January, 2012
  • Received 10 October 2011

© 2012 American Physical Society

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