Unified model of baryonic matter and dark components

Details Unified model of baryonic matter and dark components Unified model of baryonic matter and dark components

2007-06-28

arxiv.org/abs/0706.4142v2

Phys.Lett.B666:205-211,2008

Astronomy and Astrophysics

Astrophysics

8 pages, 6 figures A new section added

Scientific paper

10.1016/j.physletb.2008.07.064

We investigate an interacting two-fluid cosmological model and introduce a scalar field representation by means of a linear combination of the individual energy densities. Applying the integrability condition to the scalar field equation we show that this "exotic quintessence" is driven by an exponential potential and the two-fluid mixture can be considered as a model of three components. These components are associated with baryonic matter, dark matter and dark energy respectively. We use the Simon, Verde & Jimenez (2005) determination of the redshift dependence of the Hubble parameter to constrain the current density parameters of this model. With the best fit density parameters we obtain the transition redshift between non accelerated and accelerated regimes z_{acc}=0.66 and the time elapsed since the initial singularity t_0= 19.8 Gyr. We study the perturbation evolution of this model and find that the energy density perturbation decreases with the cosmological time.

Affiliated with

Also associated with

No associations

Rating

Unified model of baryonic matter and dark components 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 Unified model of baryonic matter and dark components, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Unified model of baryonic matter and dark components will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-456085