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

Viktor Czinner, M. Vasúth, Árpád Lukács

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The integrated Sachs-Wolfe (ISW) effect in a Λ 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 momenta and show the agreement of our results with earlier, numeric calculations.

Original languageEnglish
Pages (from-to)7233-7240
Number of pages8
JournalInternational Journal of Modern Physics A
Volume20
Issue number30
DOIs
Publication statusPublished - Dec 10 2005

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universe
Perturbation
ideal fluids
perturbation
Ideal Fluid
Scale Invariant
Einstein Equations
Time Dependence
Cosmological Constant
Einstein equations
Numerics
Power Spectrum
Analytic Solution
Microwave
time dependence
power spectra
Anisotropy
Gauge
Momentum
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Keywords

  • Background radiations
  • Relativistic cosmology

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Mathematical Physics
  • Nuclear and High Energy Physics

Cite this

An analytic approach to the late ISW effect in a Λ dominated universe. / Czinner, Viktor; Vasúth, M.; Lukács, Árpád.

In: International Journal of Modern Physics A, Vol. 20, No. 30, 10.12.2005, p. 7233-7240.

Research output: Contribution to journalArticle

Czinner, Viktor ; Vasúth, M. ; Lukács, Árpád. / An analytic approach to the late ISW effect in a Λ dominated universe. In: International Journal of Modern Physics A. 2005 ; Vol. 20, No. 30. pp. 7233-7240.
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