Large-scale structure and integrated Sachs-Wolfe effect in decaying vacuum cosmology

H. Velten, H. A. Borges, S. Carneiro, R. Fazolo, S. Gomes

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Abstract

The concordance particle creation model - a class of Λ(t) Cold Dark Matter (CDM) cosmologies - is studied using large-scale structure (LSS) formation, with particular attention to the integrated Sachs-Wolfe effect. The evolution of the gravitational potential and the amplitude of the cross-correlation of the cosmic microwave background (CMB) signal with LSS surveys are calculated in detail. We properly include in our analysis the peculiarities involving the baryonic dynamics of the Λ(t)CDM model which were not included in previous works. Although both the Λ(t)CDM and the standard cosmology are in agreement with available data for the CMB-LSS correlation, the former presents a slightly higher signal which can be identified with future data.

Original languageEnglish
Pages (from-to)2220-2224
Number of pages5
JournalMonthly Notices of the Royal Astronomical Society
Volume452
Issue number2
Early online date23 Jul 2015
DOIs
Publication statusPublished - 11 Sep 2015
Externally publishedYes

Keywords

  • Dark energy
  • Dark matter

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