Homogeneous and isotropic big rips?

被引：11
|
作者：
Giovannini, M
机构：
[1] Ctr Enrico Fermi, I-00184 Rome, Italy
[2] CERN, Div Theory, Dept Phys, CH-1211 Geneva, Switzerland
来源：
PHYSICAL REVIEW D | 2005年 / 72卷 / 08期
关键词：
D O I：
10.1103/PhysRevD.72.083508
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We investigate the way big rips are approached in a fully inhomogeneous description of the space-time geometry. If the pressure and energy densities are connected by a (supernegative) barotropic index, the spatial gradients and the anisotropic expansion decay as the big rip is approached. This behavior is contrasted with the usual big-bang singularities. A similar analysis is performed in the case of sudden (quiescent) singularities and it is argued that the spatial gradients may well be non-negligible in the vicinity of pressure singularities.
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页数：5
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