Unified dark energy models : a phenomenological approach

Details Unified dark energy models : a phenomenological approach Unified dark energy models : a phenomenological approach

2004-02-10

arxiv.org/abs/astro-ph/0402228v1

Phys.Rev. D69 (2004) 083517

Astronomy and Astrophysics

Astrophysics

12 pages, 10 figures, accepted for publication on Physical Review D

Scientific paper

10.1103/PhysRevD.69.083517

A phenomenological approach is proposed to the problem of universe accelerated expansion and of the dark energy nature. A general class of models is introduced whose energy density depends on the redshift $z$ in such a way that a smooth transition among the three main phases of the universe evolution (radiation era, matter domination, asymptotical de Sitter state) is naturally achieved. We use the estimated age of the universe, the Hubble diagram of Type Ia Supernovae and the angular size - redshift relation for compact and ultracompact radio structures to test whether the model is in agreement with astrophysical observation and to constrain its main parameters. Although phenomenologically motivated, the model may be straightforwardly interpreted as a two fluids scenario in which the quintessence is generated by a suitably chosen scalar field potential. On the other hand, the same model may also be read in the context of unified dark energy models or in the framework of modified Friedmann equation theories.

Affiliated with

Also associated with

No associations

Rating

Unified dark energy models : a phenomenological approach 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 dark energy models : a phenomenological approach, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Unified dark energy models : a phenomenological approach will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-167532