Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2011-07-06
Phys.Rev.D84:063519,2011
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
6 pages, 3 figures, minor changes, results unchanged, matched Phys. Rev. D published version
Scientific paper
10.1103/PhysRevD.84.063519
We examine the dark energy and matter densities allowed by precision measurements of distances out to various redshifts, in the presence of spatial curvature and (near) arbitrary behavior of the dark energy equation of state. Degeneracies among the parameters permit a remarkably large variation in their values when using only distance measurements of the late time universe and making no assumptions about the dark energy or curvature. Going beyond distance measurements to a lower limit on the growth of structure bounds the allowed region significantly but still leaves considerable freedom to match a flat LCDM model with dark energy very different from a cosmological constant. The combination of distances with Hubble parameter, gravitational lensing or other large scale structure data is essential to determining robustly the cosmological model.
Linder Eric V.
Shafieloo Arman
No associations
LandOfFree
Cosmographic Degeneracy 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 Cosmographic Degeneracy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmographic Degeneracy will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-677649