CMB radiation power spectrum in CDM open universes up to 2nd order perturbations

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dc.creatorSanz, Jose L.
dc.creatorMartinez-Gonzalez, Enrique
dc.creatorCayon, Laura
dc.creatorSilk, Joseph
dc.creatorSugiyama, Naoshi
dc.date1996-02-28
dc.date.accessioned2026-07-07T02:20:56Z
dc.date.available2026-07-07T02:20:56Z
dc.descriptionA second--order perturbation theory approach is developed to calculate temperature anisotropies in the cosmic microwave background. Results are given for open universes and fluctuations corresponding to CDM models with either Harrison-Zeldovich (HZ) or Lyth-Stewart-Ratra-Peebles (LSRP) primordial energy--density fluctuation power spectrum. Our perturbation theory approach provides a distinctive multipole contribution as compared to the primary one, the amplitude of the effect being very dependent on normalization. For low--$Ω$ models, the contribution of the secondary multipoles to the radiation power spectrum is negligible both for standard recombination and reionized scenarios, with the 2--year COBE--DMR normalization. For a flat universe this contribution is $\approx 0.1-10\%$ depending on the reionization history of the universe and on the normalization of the power spectrum.
dc.descriptionplain tex, 8 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/astro-ph/9602148
dc.identifierhttp://arxiv.org/abs/astro-ph/9602148
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/10383
dc.subjectAstrophysics
dc.titleCMB radiation power spectrum in CDM open universes up to 2nd order perturbations
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