Scalar Field as Dark Energy Accelerating Expansion of the Universe

Details Scalar Field as Dark Energy Accelerating Expansion of the Universe Scalar Field as Dark Energy Accelerating Expansion of the Universe

2008-05-24

arxiv.org/abs/0805.3782v2

Astronomy and Astrophysics

Astrophysics

14 pages, 14 figures, accepted for publication by Kinematics and Physics of Celestial Bodies (UA)

Scientific paper

10.3103/S0884591308060019

The features of a homogeneous scalar field $\phi$ with classical Lagrangian $L=\phi_{;i}\phi^{;i}/2-V(\phi)$ and tachyon field Lagrangian $L=-V(\phi)\sqrt{1-\phi_{;i}\phi^{;i}}$ causing the observable accelerated expansion of the Universe are analyzed. The models with constant equation-of-state parameter $w_{de}=p_{de}/\rho_{de}<-1/3$ are studied. For both cases the fields $\phi(a)$ and potentials $V(a)$ are reconstucted for the parameters of cosmological model of the Universe derived from the observations. The effect of rolling down of the potential $V(\phi)$ to minimum is shown.

Affiliated with

Also associated with

No associations

Rating

Scalar Field as Dark Energy Accelerating Expansion of the Universe 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 Scalar Field as Dark Energy Accelerating Expansion of the Universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scalar Field as Dark Energy Accelerating Expansion of the Universe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-666168