Artículo
Large-scale inhomogeneities in modified Chaplygin gas cosmologies
Fecha de publicación:
12/2005
Editorial:
Elsevier Science
Revista:
Physics Letters B
ISSN:
0370-2693
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
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), ΛCDM and generalized Chaplygin scenarios. We find that unlike that like the latter, our models resemble ΛCDM.
Palabras clave:
Homogeneous Chaplygin Gas
,
Zeldovich Approximation
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Articulos(IFIBA)
Articulos de INST.DE FISICA DE BUENOS AIRES
Articulos de INST.DE FISICA DE BUENOS AIRES
Citación
Chimento, Luis Pascual; Lazkoz, Ruth; Large-scale inhomogeneities in modified Chaplygin gas cosmologies; Elsevier Science; Physics Letters B; 615; 3-4; 12-2005; 146-152
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