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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

EXTENDED SPHERICAL COLLAPSE AND THE ACCELERATING UNIVERSE

Full text
Author(s):
Del Popolo, A. [1, 2] ; Pace, F. [3] ; Lima, J. A. S. [2]
Total Authors: 3
Affiliation:
[1] Univ Catania, Ist Astron, I-95125 Catania - Italy
[2] Univ Sao Paulo, Dept Astron, BR-05508900 Sao Paulo, SP - Brazil
[3] Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants - England
Total Affiliations: 3
Document type: Journal article
Source: INTERNATIONAL JOURNAL OF MODERN PHYSICS D; v. 22, n. 8 JUL 2013.
Web of Science Citations: 42
Abstract

The influence of the shear stress and angular momentum on the nonlinear spherical collapse model is discussed in the framework of the Einstein-de Sitter and Lambda CDM models. By assuming that the vacuum component is not clustering within the homogeneous nonspherical overdensities, we show how the local rotation and shear affect the linear density threshold for collapse of the nonrelativistic component (delta(c)) and its virial overdensity (Delta(V)). It is also found that the net effect of shear and rotation in galactic scale is responsible for higher values of the linear overdensity parameter as compared with the standard spherical collapse model (no shear and rotation). (AU)

FAPESP's process: 11/20688-1 - Constraining accelerating models of the universe with SNe type IA, galaxy clusters, small-scale structure and complementary observations
Grantee:Jose Ademir Sales de Lima
Support type: Research Grants - Visiting Researcher Grant - International
FAPESP's process: 04/13668-0 - Cosmology in the era of precision: dark energy, dark matter and background cosmic radiation
Grantee:Jose Ademir Sales de Lima
Support type: Research Projects - Thematic Grants