Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2004-11-26
Mon.Not.Roy.Astron.Soc.362:213-228,2005
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
MN2e LaTeX style file, 17 pages, 16 figures, 22 figure files; replecement has minor changes in references
Scientific paper
10.1111/j.1365-2966.2005.09292.x
We 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.
Bolejko Krzysztof
Hellaby Charles
Krasinski Andrzej
No associations
LandOfFree
Formation of voids in the Universe within the Lemaitre-Tolman model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Formation of voids in the Universe within the Lemaitre-Tolman model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Formation of voids in the Universe within the Lemaitre-Tolman model will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-353339