Large-scale inhomogeneities may improve the cosmic concordance of supernovae

• Verfasst von: Amendola, Luca [VerfasserIn]
• Titel: Large-scale inhomogeneities may improve the cosmic concordance of supernovae
• Verf.angabe: Luca Amendola, Kimmo Kainulainen, Valerio Marra, and Miguel Quartin
• Fussnoten: Gesehen am 13.11.2017
• Titel Quelle: Enthalten in: Physical review letters
• Jahr Quelle: 2010
• Band/Heft Quelle: 105(2010,12) Artikel-Nummer 121302, 4 Seiten
• ISSN Quelle: 1079-7114
• DOI: doi:10.1103/PhysRevLett.105.121302
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 156527122X

Abstract

We reanalyze the supernova 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 ΩM, ΩΛ, and w in the presence of inhomogeneities, approximately modeled with a single-mass population of halos. We then perform a likelihood analysis in the parameter space of Friedmann-Lemaître-Robertson-Walker models 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 Lambda-Cold Dark Matter model, improving the agreement with the constraints coming from the cosmic microwave background and baryon acoustic oscillations.