Time Variable Cosmological Constants from the Age of Universe

Details Time Variable Cosmological Constants from the Age of Universe Time Variable Cosmological Constants from the Age of Universe

2009-05-29

arxiv.org/abs/0905.4773v1

Phys.Lett.B690:333-336,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

6 pages, 2 figures

Scientific paper

10.1016/j.physletb.2010.05.058

In this paper, time variable cosmological constant, dubbed {\it age cosmological constant}, is investigated motivated by the fact: any cosmological length scale and time scale can introduce a cosmological constant or vacuum energy density into Einstein's theory. The age cosmological constant takes the form $\rho_{\Lambda}=3c^2M^2_P/t_{\Lambda}^2$, where $t_{\Lambda}$ is the age of our universe or conformal time. The effective equation of state of age cosmological constant are $w^{eff}_{\Lambda}=-1+{2/3}\frac{\sqrt{\Omega_{\Lambda}}}{c}$ and $w^{eff}_{\Lambda}=-1+{2/3}\frac{\sqrt{\Omega_{\Lambda}}}{c}(1+z)$ when the age of universe and conformal time are taken as the role of cosmological time scales respectively. They are the same as the so-called agegraphic dark energy models. However, the evolution history are different from the agegraphic ones for their different evolution equations.

Affiliated with

Also associated with

No associations

Rating

Time Variable Cosmological Constants from the Age of 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 Time Variable Cosmological Constants from the Age of Universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Time Variable Cosmological Constants from the Age of Universe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-526789