6533b821fe1ef96bd127b883

RESEARCH PRODUCT

Biases on cosmological parameters by general relativity effects

Olga MenaStefano RigolinLaura Lopez-honorez

subject

PhysicsNuclear and High Energy PhysicsCosmology and Nongalactic Astrophysics (astro-ph.CO)010308 nuclear & particles physicsEquation of state (cosmology)Dark matterScalar field dark matterFísicaFOS: Physical sciencesLambda-CDM modelAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesPhysical cosmologyTheoretical physicsThermodynamics of the universeClassical mechanics0103 physical sciencesDark energy010303 astronomy & astrophysicsDark fluidAstrophysics - Cosmology and Nongalactic Astrophysics

description

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.

yearjournalcountryeditionlanguage
2012-01-09
https://dx.doi.org/10.48550/arxiv.1109.5117