Cosmology when living near the Great Attractor

• Verfasst von: Valkenburg, Wessel [VerfasserIn]
• Verfasst von: Eggers Bjælde, Ole [VerfasserIn]
• Titel: Cosmology when living near the Great Attractor
• Verf.angabe: Wessel Valkenburg, Ole Eggers Bjælde
• Umfang: 7 S.
• Fussnoten: Gesehen am 06.04.2018
• Titel Quelle: Enthalten in: Royal Astronomical Society: Monthly notices of the Royal Astronomical Society
• Jahr Quelle: 2012
• Band/Heft Quelle: 424(2012), 1, S. 495-501
• ISSN Quelle: 1365-2966
• DOI: doi:10.1111/j.1365-2966.2012.21218.x
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1571768300

Abstract

If we live in the vicinity of the hypothesized Great Attractor, the age of the universe as inferred from the local expansion rate can be off by 3 per cent. We study the effect that living inside or near a massive overdensity has on cosmological parameters induced from observations of supernovae, the Hubble parameter and the cosmic microwave background. We compare the results to those for an observer in a perfectly homogeneous Λ cold dark matter universe. We find that for instance the inferred value for the global Hubble parameter changes by around three per cent if we happen to live inside a massive overdensity such as the hypothesized Great Attractor. Taking into account the effect of such structures on our perception of the universe makes cosmology perhaps less precise, but more accurate.