Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-01-14
Phys.Rev.D78:123504,2008
Astronomy and Astrophysics
Astrophysics
12 pages, 13 figures, added new section, accepted for publication in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.78.123504
We estimate the amplitude of perturbation in dark energy at different length scales for a quintessence model with an exponential potential. It is shown that on length scales much smaller than hubble radius, perturbation in dark energy is negligible in comparison to that in in dark matter. However, on scales comparable to the hubble radius ($\lambda_{p}>1000\mathrm{Mpc}$) the perturbation in dark energy in general cannot be neglected. As compared to the $\Lambda$CDM model, large scale matter power spectrum is suppressed in a generic quintessence dark energy model. We show that on scales $\lambda_{p} < 1000\mathrm{Mpc}$, this suppression is primarily due to different background evolution compared to $\Lambda$CDM model. However, on much larger scales perturbation in dark energy can effect matter power spectrum significantly. Hence this analysis can act as a discriminator between $\Lambda$CDM model and other generic dark energy models with $w_{de} \neq -1$.
Jassal H. K.
Seshadri T. R.
Unnikrishnan Sanil
No associations
LandOfFree
Scalar Field Dark Energy Perturbations and their Scale Dependence 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 Dark Energy Perturbations and their Scale Dependence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scalar Field Dark Energy Perturbations and their Scale Dependence will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-633926