Perturbations of a cosmological constant dominated universe

Mátyás Vasúth, Viktor Czinner

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

One of the proposed form of dark energy is the cosmological constant. We give the complete C solution governing linear perturbations of a spatially flat Friedmann-Robertson-Walker model with a pressureless ideal fluid source and non-vanishing cosmological constant. Using the potential which belongs to the growing mode of the relative energy density fluctuations, we separate the Sachs-Wolfe and Integrated Sachs-Wolfe terms. It is found that the part of the Sachs-Wolfe term which becomes time dependent in the presence of a cosmological constant underwent a reversal approximately two billion years ago. Using the time dependence of the perturbation potentials we give the analytic expression for the argument of the ISW integral for an arbitrary initial power spectrum of the fluctuations.

Original languageEnglish
Title of host publication11th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories - Proc. of the MG11 Meeting on General Relativity
Pages1788-1790
Number of pages3
Publication statusPublished - Dec 1 2008
Event11th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories, MG 2006 - Berlin, Germany
Duration: Jul 23 2006Jul 29 2006

Publication series

Name11th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories - Proc. of the MG11 Meeting on General Relativity

Other

Other11th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories, MG 2006
CountryGermany
CityBerlin
Period7/23/067/29/06

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Vasúth, M., & Czinner, V. (2008). Perturbations of a cosmological constant dominated universe. In 11th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories - Proc. of the MG11 Meeting on General Relativity (pp. 1788-1790). (11th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories - Proc. of the MG11 Meeting on General Relativity).