An analytic approach to the late ISW effect in a Lambda dominated universe

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dc.creatorCzinner, Viktor
dc.creatorVasúth, Mátyás
dc.creatorLukács, Árpád
dc.date2005-03-16
dc.date2005-04-22
dc.date.accessioned2026-07-07T06:24:50Z
dc.date.available2026-07-07T06:24:50Z
dc.descriptionThe integrated Sachs-Wolfe (ISW) effect in a Lambda dominated universe can be an important factor in the evolution of cosmic microwave background fluctuations. With the inclusion of cosmological constant we present the complete analytic solution of the covariant linear perturbations of the Einstein equations in the Newtonian gauge, in the case of a spatially flat (K=0), Friedman-Robertson-Walker (FRW) universe, filled with pressureless ideal fluid. We use the analytic time dependence of the perturbation potentials to derive the anisotropy power spectrum of the late ISW effect. We choose the scale invariant Harrison-Zeldovich spectrum for obtaining the C_l momenta and show the agreement of our results with earlier, numeric calculations.
dc.description10 pages, 1 figure
dc.identifierhttps://arxiv.org/abs/astro-ph/0503347
dc.identifierhttp://arxiv.org/abs/astro-ph/0503347
dc.identifierInt.J.Mod.Phys. A20 (2005) 7233-7240
dc.identifierdoi:10.1142/S0217751X05024328
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/96679
dc.subjectAstrophysics
dc.titleAn analytic approach to the late ISW effect in a Lambda dominated universe
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