Formation of voids in the Universe within the Lemaitre-Tolman model

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dc.creatorBolejko, Krzysztof
dc.creatorKrasinski, Andrzej
dc.creatorHellaby, Charles
dc.date2004-11-26
dc.date2004-11-30
dc.date.accessioned2026-07-07T10:48:17Z
dc.date.available2026-07-07T10:48:17Z
dc.descriptionWe develop models of void formation starting from a small initial fluctuation at recombination and growing to a realistic present day density profile in agreement with observations of voids. The model construction is an extension of previously developed algorithms for finding a Lemaitre-Tolman metric that evolves between two profiles of either density or velocity specified at two times. Of the 4 profiles of concern -- those of density and velocity at recombination and at the present day -- two can be specified and the other two follow from the derived model. We find that, in order to reproduce the present-day void density profiles, the initial velocity profile is more important than the initial density profile. Extrapolation of current CMB observations to the scales relevant to proto-voids is very uncertain. Even so, we find that it is very difficult to make both the initial density and velocity fluctuation amplitudes small enough, and still obtain a realistic void by today.
dc.descriptionMN2e LaTeX style file, 17 pages, 16 figures, 22 figure files; replecement has minor changes in references
dc.identifierhttps://arxiv.org/abs/gr-qc/0411126
dc.identifierhttp://arxiv.org/abs/gr-qc/0411126
dc.identifierMon.Not.Roy.Astron.Soc.362:213-228,2005
dc.identifierdoi:10.1111/j.1365-2966.2005.09292.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/183822
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.titleFormation of voids in the Universe within the Lemaitre-Tolman model
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