CMB constraints on spatial variations of the vacuum energy density

• Type: Article in International Scientific Journal
• Date: 2002

Authors

Avelino, PP (Author) FCUP; Canavezes, A (Author) Other; de Carvalho, JPM (Author) FCUP; Martins, CJAP (Author) Other

Journal

Title: Astroparticle Physics

Vol. 17

Pages: 367-373

ISSN: 0927-6505

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 2 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-000-P38

DOI: 10.1016/s0927-6505(01)00159-1

Abstract (EN): In a recent article, a simple 'spherical bubble' toy model for a spatially varying vacuum energy density was introduced, and type la supernovae data was used to constrain it. Here we generalize the model to allow for the fact that we may not necessarily be at the center of a region with a given set of cosmological parameters, and discuss the constraints on these models coming from cosmic microwave background radiation data. We find tight constraints on possible spatial variations of the vacuum energy density for any significant deviations from the center of the bubble and we comment on the relevance of our results.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7