Friedmann cosmology with a generalized equation of state and bulk viscosity
| dc.creator | Meng, Xin-He | |
| dc.creator | Ren, Jie | |
| dc.creator | Hu, Ming-Guang | |
| dc.date | 2005-09-09 | |
| dc.date.accessioned | 2026-07-07T12:53:40Z | |
| dc.date.available | 2026-07-07T12:53:40Z | |
| dc.description | The universe media is considered as a non-perfect fluid with bulk viscosity and described by a more general equation of state. We assume the bulk viscosity is a linear combination of the two terms: one is constant, and the other is proportional to the scalar expansion $θ=3\dot{a}/a$. The equation of state is described as $p=(γ-1)ρ+p_0$, where $p_0$ is a parameter. This model can be used to explain the dark energy dominated universe. Different choices of the parameters may lead to three kinds of fates of the cosmological evolution: no future singularity, big rip, or Type III singularity of Ref. [S. Nojiri, S.D. Odintsov, and S. Tsujikawa, Phys. Rev. D \textbf{71}, 063004 (2005)]. | |
| dc.description | 5 pages and 4 figs | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0509250 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0509250 | |
| dc.identifier | Commun.Theor.Phys.47:379-384,2007 | |
| dc.identifier | doi:10.1088/0253-6102/47/2/036 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/223698 | |
| dc.subject | Astrophysics | |
| dc.title | Friedmann cosmology with a generalized equation of state and bulk viscosity | |
| dc.type | text |