The signature of dark energy perturbations in galaxy cluster surveys

Details The signature of dark energy perturbations in galaxy cluster surveys The signature of dark energy perturbations in galaxy cluster surveys

2009-02-18

arxiv.org/abs/0902.3226v1

JCAP 0907:040,2009

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

5 pages, 4 figures

Scientific paper

10.1088/1475-7516/2009/07/040

All models of dynamical dark energy possess fluctuations, which affect the number of galaxy clusters in the Universe. We have studied the impact of dark energy clustering on the number of clusters using a generalization of the spherical collapse model and the Press-Schechter formalism. Our statistical analysis is performed in a 7-parameter space using the Fisher matrix method, for several hypothetical Sunyaev-Zel'dovich and weak lensing (shear maps) surveys. In some scenarios, the impact of these fluctuations is large enough that their effect could already be detected by existing instruments such as the South Pole Telescope, when its data is combined with WMAP and SDSS. Future observations could go much further and probe the nature of dark energy by distinguishing between different models on the basis of their perturbations, not only their expansion histories.

Affiliated with

Also associated with

No associations

Rating

The signature of dark energy perturbations in galaxy cluster surveys 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 The signature of dark energy perturbations in galaxy cluster surveys, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The signature of dark energy perturbations in galaxy cluster surveys will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-129137