TY - JOUR
T1 - Dissipative generalized Chaplygin gas as phantom dark energy
AU - Cruz, Norman
AU - Lepe, Samuel
AU - Peña, Francisco
N1 - Funding Information:
N.C. and S.L. acknowledge the hospitality of the Physics Department of Universidad de La Frontera where part of this work was done. S.L. acknowledges the hospitality of the Physics Department of Universidad de Santiago de Chile. We acknowledge the partial support to this research by CONICYT through grant No. 1040229 (N.C. and S.L.). It also was supported from DIUFRO No. 120618, of Dirección de Investigación y Desarrollo, Universidad de La Frontera (F.P.) and DI-PUCV, Grants 123.784/06 and 123.105/05 (S.L.), Pontificia Universidad Católica de Valparaíso.
PY - 2007/3/15
Y1 - 2007/3/15
N2 - The generalized Chaplygin gas, characterized by the equation of state p = - A / ρα, has been considered as a model for dark energy due to its dark-energy-like evolution at late times. When dissipative processes are taken into account, within the framework of the standard Eckart theory of relativistic irreversible thermodynamics, cosmological analytical solutions are found. Using the truncated causal version of the Israel-Stewart formalism, a suitable model was constructed which crosses the w = - 1 barrier. The future-singularities encountered in both approaches are of a new type, and not included in the classification presented by Nojiri and Odintsov [S. Nojiri, S.D. Odintsov, Phys. Rev. D 72 (2005) 023003].
AB - The generalized Chaplygin gas, characterized by the equation of state p = - A / ρα, has been considered as a model for dark energy due to its dark-energy-like evolution at late times. When dissipative processes are taken into account, within the framework of the standard Eckart theory of relativistic irreversible thermodynamics, cosmological analytical solutions are found. Using the truncated causal version of the Israel-Stewart formalism, a suitable model was constructed which crosses the w = - 1 barrier. The future-singularities encountered in both approaches are of a new type, and not included in the classification presented by Nojiri and Odintsov [S. Nojiri, S.D. Odintsov, Phys. Rev. D 72 (2005) 023003].
UR - http://www.scopus.com/inward/record.url?scp=33847412848&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2006.12.070
DO - 10.1016/j.physletb.2006.12.070
M3 - Article
AN - SCOPUS:33847412848
SN - 0370-2693
VL - 646
SP - 177
EP - 182
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 4
ER -