Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
1996-05-28
Class.Quant.Grav.12:2335-2354,1995
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
35 pages, REVTeX, 3 Encapsulated PostScript Figures
Scientific paper
10.1088/0264-9381/12/9/019
The truncated Israel-Stewart theory of irreversible thermodynamics is used to describe the bulk viscous pressure and the anisotropic stress in a class of spatially homogeneous viscous fluid cosmological models. The governing system of differential equations is written in terms of dimensionless variables and a set of dimensionless equations of state is utilized to complete the system. The resulting dynamical system is then analyzed using standard geometric techniques. It is found that the presence of anisotropic stress plays a dominant role in the evolution of the anisotropic models. In particular, in the case of the Bianchi type I models it is found that anisotropic stress leads to models that violate the weak energy condition and to the creation of a periodic orbit in some instances. The stability of the isotropic singular points is analyzed in the case with zero heat conduction; it is found that there are ranges of parameter values such that there exists an attracting isotropic Friedmann-Robertson-Walker model. In the case of zero anisotropic stress but with non-zero heat conduction the stability of the singular points is found to be the same as in the corresponding case with zero heat conduction; hence the presence of heat conduction does not apparently affect the global dynamics of the model.
Coley Alan A.
den Hoogen Robert J. van
No associations
LandOfFree
Qualitative Analysis of Causal Anisotropic Viscous Fluid Cosmological Models does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Qualitative Analysis of Causal Anisotropic Viscous Fluid Cosmological Models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Qualitative Analysis of Causal Anisotropic Viscous Fluid Cosmological Models will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-604760