Large-scale inhomogeneities in modified Chaplygin gas cosmologies

Autores
<div class="autor_fcen" id="1852">Chimento, L.P.</div>; Lazkoz, R.
Año de publicación
2005
Idioma
inglés
Tipo de recurso
artículo
Estado
Versión publicada
Descripción
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. © 2005 Elsevier B.V. All rights reserved.
Fil:Chimento, L.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.
Fuente
Phys Lett Sect B Nucl Elem Part High-Energy Phys 2005;615(3-4):146-152
Materia
article
chemical modification
cold
cosmos
darkness
gas
molecular model
Nivel de accesibilidad
Acceso abierto
Licencia
http://creativecommons.org/licenses/by/2.5/ar
Repositorio
Biblioteca Digital (UBA-FCEN)
Institución
Universidad Nacional de Buenos Aires. Facultad de Ciencias Exactas y Naturales
OAI Identificador
snrd:HASH535993a4e735a79686b51d