Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-06-06
Gen.Rel.Grav. 33 (2001) 455-477
Astronomy and Astrophysics
Astrophysics
LaTeX, 17 pages, 4 figures. Submitted to GRG 20/4/2000
Scientific paper
We consider a spherically symmetric distribution of dust and show that it is possible, under general physically reasonable conditions, for an overdensity to evolve to an underdensity (and vice versa). We find the conditions under which this occurs and illustrate it on a class of regular Lemaitre-Tolman-Bondi solutions. The existence of this phenomenon, if verified, would have the result that the topology of density contours, assumed fixed in standard structure formation theories, would have to change and that luminous matter would not trace the dark matter distribution so well.
Hellaby Charles
Mustapha Nazeem
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