6533b7d3fe1ef96bd1261687
RESEARCH PRODUCT
Large-scale inhomogeneities may improve the cosmic concordance of supernovae
Kimmo KainulainenKimmo KainulainenValerio MarraValerio MarraMiguel QuartinMiguel QuartinLuca AmendolaLuca Amendolasubject
Physicseducation.field_of_studyCosmology and Nongalactic Astrophysics (astro-ph.CO)010308 nuclear & particles physicsCosmic microwave backgroundPopulationDark matterGeneral Physics and AstronomyFOS: Physical sciencesLambda-CDM modelAstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsGeneral Relativity and Quantum Cosmology (gr-qc)01 natural sciencesGeneral Relativity and Quantum CosmologyObservational cosmology0103 physical sciencesDark energyBaryon acoustic oscillationseducation010303 astronomy & astrophysicsWeak gravitational lensingAstrophysics - Cosmology and Nongalactic Astrophysicsdescription
We reanalyze the supernovae data from the Union Compilation including the weak lensing effects caused by inhomogeneities. We compute the lensing probability distribution function for each background solution described by the parameters Omega_M, Omega_L and w in the presence of inhomogeneities, approximately modeled with a single-mass population of halos. We then perform a likelihood analysis in the space of FLRW-parameters and compare our results with the standard approach. We find that the inclusion of lensing can move the best-fit model significantly towards the cosmic concordance of the flat LCDM model, improving the agreement with the constraints coming from the cosmic microwave background and baryon acoustic oscillations.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-02-05 |