A New Model of Agegraphic Dark Energy

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

8 pages, revtex4; v2: Phys. Lett. B in press; v3: published version

Scientific paper

10.1016/j.physletb.2007.12.030

In this note, we propose a new model of agegraphic dark energy based on the K\'{a}rolyh\'{a}zy relation, where the time scale is chosen to be the conformal time $\eta$ of the Friedmann-Robertson-Walker (FRW) universe. We find that in the radiation-dominated epoch, the equation-of-state parameter of the new agegraphic dark energy $w_q=-1/3$ whereas $\Omega_q=n^2a^2$; in the matter-dominated epoch, $w_q=-2/3$ whereas $\Omega_q=n^2a^2/4$; eventually, the new agegraphic dark energy dominates; in the late time $w_q\to -1$ when $a\to\infty$, and the new agegraphic dark energy mimics a cosmological constant. In every stage, all things are consistent. The confusion in the original agegraphic dark energy model proposed in arXiv:0707.4049 disappears in this new model. Furthermore, $\Omega_q\ll 1$ is naturally satisfied in both radiation-dominated and matter-dominated epochs where $a\ll 1$. In addition, we further extend the new agegraphic dark energy model by including the interaction between the new agegraphic dark energy and background matter. In this case, we find that $w_q$ can cross the phantom divide.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

A New Model of Agegraphic Dark Energy 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 A New Model of Agegraphic Dark Energy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A New Model of Agegraphic Dark Energy will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-170161

All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.