Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2010-10-03
Phys.Rev.D82:124054,2010
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
14 pages, 4 figures
Scientific paper
10.1103/PhysRevD.82.124054
We study the cosmology of a covariant Galileon field with five covariant Lagrangians and confront this theory with the most recent cosmological probes: the type Ia supernovae data (Constitution and Union2 sets), cosmic microwave background (WMAP7) and the baryon acoustic oscillations (SDSS7). In the Galileon cosmology with a late-time de Sitter attractor, there is a tracker that attracts solutions with different initial conditions to a common trajectory. Including the cosmic curvature K, we place observational constraints on two distinct cases: (i) the tracker, and (ii) the generic solutions to the equations of motion. We find that the tracker solution can be consistent with the individual observational data, but it is disfavored by the combined data analysis. The generic solutions fare quite well when a non-zero curvature parameter is taken into account, but the Akaike and Bayesian information criteria show that they are not particularly favored over the LCDM model.
de Felice Antonio
Nesseris Savvas
Tsujikawa Shinji
No associations
LandOfFree
Observational constraints on Galileon cosmology 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 Observational constraints on Galileon cosmology, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observational constraints on Galileon cosmology will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-512374