Friedmann cosmology with a generalized equation of state and bulk viscosity

Details Friedmann cosmology with a generalized equation of state and bulk viscosity Friedmann cosmology with a generalized equation of state and bulk viscosity

2005-09-09

arxiv.org/abs/astro-ph/0509250v1

Commun.Theor.Phys.47:379-384,2007

Astronomy and Astrophysics

Astrophysics

5 pages and 4 figs

Scientific paper

10.1088/0253-6102/47/2/036

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 $\theta=3\dot{a}/a$. The equation of state is described as $p=(\gamma-1)\rho+p_0$, 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)].

Affiliated with

Also associated with

No associations

Rating

Friedmann cosmology with a generalized equation of state and bulk viscosity 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 Friedmann cosmology with a generalized equation of state and bulk viscosity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Friedmann cosmology with a generalized equation of state and bulk viscosity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-465129