Tracking and coupled dark energy as seen by WMAP

Details Tracking and coupled dark energy as seen by WMAP Tracking and coupled dark energy as seen by WMAP

2003-03-11

arxiv.org/abs/astro-ph/0303228v2

Phys.Rev.D68:023514,2003

Astronomy and Astrophysics

Astrophysics

14 pages; to be submitted to Phys. Rev. D

Scientific paper

10.1103/PhysRevD.68.023514

The satellite experiment WMAP has produced for the first time a high-coverage, high resolution survey of the microwave sky, releasing publicly available data that are likely to remain unrivalled for years to come. Here we compare the WMAP temperature power spectrum, along with an exhautive compilation of previous experiments, to models of dark energy that allow for a tracking epoch at the present, deriving updated bounds on the dark energy equation of state and the other cosmological parameters. Moreover, we complement the analysis by including a coupling of the dark energy to dark matter. The main results are: a) the WMAP data alone constrains the equation of state of tracking dark energy to be w_\phi<-0.67(-0.49) to 68%(95%) (confining the analysis to w_\phi>-1), which implies for an inverse power law potential an exponent \alpha<0.99(2.08); b) the dimensionless coupling to dark matter is |\beta|<0.07(0.13). Including the results from the supernovae Ia further constrains the dark energy equation of state.

Affiliated with

Also associated with

No associations

Rating

Tracking and coupled dark energy as seen by WMAP 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 Tracking and coupled dark energy as seen by WMAP, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tracking and coupled dark energy as seen by WMAP will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-131165