viernes, 4 de mayo de 2012

Cosmology when living near the Great Attractor

Fuente: SAO/NASA ADS arXiv e-prints Abstract Service

· Find Similar Abstracts (with default settings below)
· arXiv e-print (arXiv:1203.4567)
· References in the Article
· Citations to the Article (1) (Citation History)
· Refereed Citations to the Article
· Also-Read Articles (Reads History)
· Translate This Page
Cosmology when living near the Great Attractor
Valkenburg, WesselEggers Bjaelde, Ole
eprint arXiv:1203.4567
Publication Date:
Astrophysics - Cosmology and Extragalactic Astrophysics
8 pages, 6 figures, Submitted to MNRAS
Bibliographic Code:


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 three 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 LCDM 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.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
PDF recomended.