Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-12-05
Astron.Astrophys.449:925,2006
Astronomy and Astrophysics
Astrophysics
4 pages, 2 figures, revised version, accepted to A&A
Scientific paper
10.1051/0004-6361:20054640
We have shown earlier that, contrary to popular belief, Einstein--de Sitter (E--deS) models can still fit the {\sl WMAP} data on the cosmic microwave background provided one adopts a low Hubble constant and relaxes the usual assumption that the primordial density perturbation is scale-free. The recent {\sl SDSS} measurement of the large-scale correlation function of luminous red galaxies at $z \sim 0.35$ has however provided a new constraint by detecting a `baryon acoustic peak'. Our best-fit E--deS models do possess a baryonic feature at a similar physical scale as the best-fit $\Lambda$CDM concordance model, but do not fit the new observations as well as the latter. In particular the shape of the correlation function in the range $\sim 10-100 h^{-1}$ Mpc cannot be reproduced properly without violating the CMB angular power spectrum in the multipole range $l \sim 100-1000$. Thus, the combination of the CMB fluctuations and the shape of the correlation function up to $\sim 100 h^{-1}$Mpc, if confirmed, does seem to require dark energy for a homogeneous cosmological model based on (adiabatic) inflationary perturbations.
Blanchard Alain
Douspis Marian
Rowan-Robinson Michael
Sarkar Subir
No associations
LandOfFree
Large-scale galaxy correlations as a test for 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 Large-scale galaxy correlations as a test for dark energy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Large-scale galaxy correlations as a test for dark energy will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-86261