Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-08-14
Phys.Lett.B663:1-6,2008
Astronomy and Astrophysics
Astrophysics
11 pages, 2 tables, 3 figures, revtex4; v2: discussions added, Phys. Lett. B in press; v3: published version
Scientific paper
10.1016/j.physletb.2008.03.048
In this work, we consider the cosmological constraints on the new agegraphic dark energy (NADE) proposed in arXiv:0708.0884, by using the observational data of type Ia supernovae (SNIa), the shift parameter from cosmic microwave background (CMB) and the baryon acoustic oscillation (BAO) peak from large scale structures (LSS). Thanks to its special analytic features in the radiation-dominated and matter-dominated epochs, NADE is a single-parameter model in practice because once the single model parameter $n$ is given, all other physical quantities of NADE can be determined correspondingly. The joint analysis gives the best-fit value (with $1\sigma$ uncertainty) $n=2.716^{+0.111}_{-0.109}$, and the derived $\Omega_{m0}$, $\Omega_{q0}$ and $w_{q0}$ (with $1\sigma$ uncertainties) are $0.295^{+0.020}_{-0.020}$, $0.705^{+0.020}_{-0.020}$ and $-0.794^{+0.006}_{-0.005}$, respectively. In addition, we find that the coincidence problem could be solved naturally in the NADE model provided that $n$ is of order unity.
Cai Rong-Gen
Wei Hao
No associations
LandOfFree
Cosmological Constraints on New 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 Cosmological Constraints on New Agegraphic Dark Energy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmological Constraints on New Agegraphic Dark Energy will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-389592