Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9861250 | Physics Letters B | 2005 | 7 Pages |
Abstract
We extend the homogeneous modified Chaplygin cosmologies to large-scale perturbations by formulating a Zeldovich-like approximation. We show that the model interpolates between an epoch with a soft equation of state and a de Sitter phase, and that in the intermediate regime its matter content is simply the sum of dust and a cosmological constant. We then study how the large-scale inhomogeneities evolve and compare the results with cold dark matter (CDM), ÎCDM and generalized Chaplygin scenarios. We find that unlike that like the latter, our models resemble ÎCDM.
Related Topics
Physical Sciences and Engineering
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Authors
Luis P. Chimento, Ruth Lazkoz,