w-cosmological singularities

被引：48
作者：
Fernandez-Jambrina, L. [1 ]
机构：
[1] Univ Politecn Madrid, ETSI Navales, E-28040 Madrid, Spain
来源：
PHYSICAL REVIEW D | 2010年 / 82卷 / 12期
关键词：
PROBE WMAP OBSERVATIONS; DARK ENERGY; COSMIC CENSORSHIP; UNIVERSE; FATE;
D O I：
10.1103/PhysRevD.82.124004
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In this paper we characterize barotropic index singularities of homogeneous isotropic cosmological models [M. P. Dabrowski and T. Denkiewicz, Phys. Rev. D 79, 063521 (2009).]. They are shown to appear in cosmologies for which the scale factor is analytical with a Taylor series in which the linear and quadratic terms are absent. Though the barotropic index of the perfect fluid is singular, the singularities are weak, as it happens for other models for which the density and the pressure are regular.
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